I got married at 22, spent a couple of years doing little things having been quite ill before the wedding while dh finished his degree and had children at 24, so I see where you're coming from.
I really wanted children, and was convinced it would take some time to manage to conceive, so I was desperate to try. I'd even worked out: GP insists on 3 years trying before they'll refer you, tests take around 1-2 years, so I'd still be under 30 when trying for fertility treatment.
I conceived first month.
Now there are some things I love about having had them so young.
I had more energy. I was the fun mum rushing round the park with dd1 while the older mums said "I remember when I had more energy". The older mums tended to think I needed a little bit of help, so were always ready to help in any way-in a nice way not interfering/patronising.
I'm now not quite 40 and the children are fairly independent. We can go out in the evening leaving dd1 to babysit for a short time, the children can make dinner/a cup of tea/run up to the shops etc. when most of my school friends are asking me how to potty train or getting excited about pfb's first day at school.
Dd1 was the first grandchild/great grandchild on all sides, which was wonderfully exciting-and everyone was very excited for us. We got around 200 cards from relatives who'd hardly spoken to us, boquets of flowers etc.
And on the same way we got to decide how "family" things happened to a certain extent. At least we set a precident, which, in some things, has stayed.
There are other things that are not so good:
If we'd waited a couple of years, me got a job, dh in his job, we'd be much better off. We really continued living like students in a lot of ways, watching the money, eating out being a big treat etc. It might have been nice to have a couple of years where we'd had a couple of adventurous holidays, and saved a bit of money so that when (eg) the car needs replacing we're not worrying about how we can do this without leaving the cupboards bare.
A couple of years of working back then would make a huge difference to me trying to find a job. I have a good maths degree, and can't even get interviews at times. You see, I've never done a "proper job". I'm coming up time and again against people who are probably no better, and worse qualified but who have experience. 1-2 years experience would make a huge difference here. I'm doing volunteer stuff at present, and am very happy to do this, but it seems a little silly.
I'm also looking at my friends and thinking "oh you're just setting out" on what I did 14 years ago. I'd love to be in with them. My dd's are constantly the oldest by far at any family or old friends event. I see the younger ones all jumped in together and then dd1's double their age, and even dd2 is not really playing in with them so much as looking after them. They're all chatting about choosing primary schools, and I have been through that so can offer what I've done, but it's different saying "I did this " to "how are you doing it". You can easily come across as a know it all, or dismissive of how important it is because you've finished with that.
We had a period (dh's family were particularly bad at this) where it seemed that we couldn't go (or couldn't both go) to things as they weren't family friendly, because no one else was considering the option of having children, so what anyone chose to suggest was not suitable for children. Now we're finding they're choosing children's places to go to that are too young for my dc, so they end up sitting on the side with nothing to do if we go.
I think what I'd say (to myself back then) is leave it a couple of years. Get your jobs sorted. Get your house sorted, and then start trying. Unless you have a really good reason why now would be better. You're still very young, and there is easily 2 years spare without feeling you're working on borrowed time.
In the month dd1 was born, dh finished his degree and started a new job, we chose a new house and moved area...and I had 24/7 morning sickness throughout pregnancy, plus just before we moved they found I was severely anaemic. It was quite stressful. (but dd1 was gorgeous)