So many voices of experience above that said what I would say.
I've returned to work part time, and even that has caused significant stress in our household.
In a way, returning to my old career with people I work with has almost been harder because I simply can't give it the same level of dedication. I feel bad, and guilty - imposter syndrome, almost, because I loved what I did and other people are so used to me being so competent that only having 3 days to do it in makes it incredibly hard to maintain the same standards. However, I now have 2 days of unpaid work a week - one morning goes on therapy, one day is on cleaning and housekeeping and extraneous appointments, and so I get two hours on a Friday afternoon to either do some extra cleaning or life admin. And I'm in the lucky percentage of adopters who is able to do even that. I can acknowledge that level of privilege in that respect.
However, I'm also aware that this won't be forever. At some point I will be able to go back into the job I love with full force, even if that's 20 years from now. It's a different season of my life. There is grief with that, but there is also the opportunity for me to do something significant and important with my own family as well. Had you asked me this before I adopted, I would have been 100% on the return to work asap (and in fact, I'm sure somewhere there is a thread about me grieving my career), so those feelings are valid and complicated, but when the needs of the kids dictated what was best for them, my priorities gradually shifted.
Luckily, it turns out that our children can (so far) tolerate some level of wraparound childcare, but the precarious nature of it is difficult for me to tolerate personally. It is very stressful. One broken cog brings the whole thing tumbling down, and my children just bloody love sticking rocks into machinery. It threw us completely off balance for 3 weeks when the childminder tried to drop the youngest off at the wrong school, we had meltdowns because he felt like I wasn't dropping him off somewhere safe. He hasn't had any untoward incidents with her (yet), but the anxiety of knowing that she could just turn round and say she doesn't want to take care of him any more because he is too difficult is often overwhelming. I can't rely on grandparents alone because it is too much for them, and they are eager to spend time with them, fit and active for their age. But still, it is not an easy ask. And there was absolutely no way of knowing whether that would be possible prior to the adoption process. If I'm brutally honest, we took a gamble in that it would work out this year, because we only put childcare into place as I started my new job. It is good luck (and tbf through lots of research and preparation) that it hasn't fallen apart just yet, but it will take a long time for me to be able to trust that it will stay like that. That's nearly two years after adopting them, and is only 3 days of consistent before and after school care a week, term time only, supported by visual timetables, EHCP support, early collections, the full shebang.
Not only that, but childcare is exhausting for my children. They keep themselves together (just about) for it, but it means that all those emotions are then squeezed into the edges of the day, right when I'm knackered. It's a big ask for them, and I do it because I believe that having a mother who is mentally in a better place because she who has some intellectual stimulation other than trying to remember all the names of dinosaurs featured on Dino Dana is probably better for them than the alternative, but it is still a big ask for them. I feel guilty for making them be in childcare so that I get to go to work to fulfil my own needs of feeling useful and needing to talk to other adults. It is only because my children have the limited tolerance that they do that I'm able to achieve this. It may well be that your child cannot tolerate it, and you will need to be prepared for how you will manage it. I have come to accept that if my children struggle too much, I will have to be the one to give up what I'm doing to care for them. And that's hard to accept.
On a practical level, it sounds like your routine can be tricky and unpredictable. Shift work is one thing, but I can imagine that if you are depending on your child to be quiet at different times, or on different days per week, it could get tricky really quickly. My children cannot bear to watch me sleep. It triggers a deep anxiety in them to know that I am unable to care for them because I am not watching them, and so expecting to be able to nap in the house when they are there, even if there is someone else to care for them, is nigh on impossible. So that potentially leaves either you or your child not being able to be in the house when you sleep.
None of this is saying don't do it, or that it is impossible, because children can be surprisingly robust in many ways. It is saying be realistic about what you will be able to do and a potential child will be able to cope with. If a child has never really had to tolerate group care, you may find that they struggle extensively with nursery. If you have a teeny tiny baby, maybe they will get used to nursery if they go regularly, and it will be ok, but do you have nurseries in your area that will be able to take her for the hours you need? And what will you do if they don't? If you adopt an older child, they might never have had before and after school clubs, and might see it as a rejection, or just simply not be able to tolerate it. Then again, they might embrace the extra playtime with their friends. Or they might have a tricky period, but settle down into it. Or might work best with different providers. It is much harder if the routine is all over the place or particularly variable too, as it feels inconsistent for the child. Those routines you can build with a stable routine become more fluid, and the child may find that hard - so the cafe you always get coffee from on a Thursday before dropping them off at the childminders is closed because your shift is the early one. Or the treat you always have on a Friday can't be kept each time because you are on nights some of the the time. My children hang their hat on what happens on each day of the week during school term times, and it helps to anchor them to what is happening and what to expect. They relish the routine. God forbid a Friday should pass and we don't go to the newsagents to buy our pack of Haribo.....but then again you could always build a routine around a McDonalds that is open 24 hours, parks that don't get locked overnight, you can buy a pack of Haribo to eat in the car if you are organised.... so maybe that's something to consider. The point is, it is impossible to know or predict whether your child will need the level of support before you have them, and if you are the sole parent, the task of accommodating that is entirely on your shoulders. Whether they can or they can't tolerate it, or to what extent you can find a workaround for the greater good of the family unit, you need to be prepared to recognise that it may well be a long old process to get them to the point where other people can care for them safely and effectively.
Anyway, nothing is impossible, but that is a different question to what is preferable and tolerable for both you and your children. Nothing will be perfect, but be prepared for things to take much longer than you think they will, or to have signficant costs (both financial and emotional) that will impact on your decision.