Yes, it will be fine.
I worked full time after having DS1 who went to full time nursery at 9mo and am just returning to work after DS2 who is just six months. (And I co-sleep and breastfeed, so I'm pretty physically hands-on as a parent in general but don't think it is incompatible.)
I also feel sick at the thought of it. But I know that it will be fine. We have no parental support nearby so no option for childcare apart from childminder or nursery. But it will still be fine. The nursery where both boys go is wonderful and they will never be short of comfort.
Yes it is true you will miss out on time with your children. That hurts. But the first time your child walks for you and sees the massive smile on your face is still a first. You will find ways of getting by. And you will enjoy some adult time. I love going to the toilet alone and discussing the news with colleagues.
And I find that working full time, I am
also personally much more patient and interested in my children than otherwise because I am aware that our time together is not as much as I would like in an ideal world. Every minute I spend with them is great and I really enjoy it. Although I love being on maternity leave too, the reality of some days filled only with nappy changes and toddler accidents means I am probably less patient and spend time looking hopefully at my phone to see what other adults have been doing. When I work and then spend time with the kids, I am very focused on them and make more effort not to let the weekends be wasted doing only chores.
Also, my DS1 is three and I met up with my NCT group the other day. Some are SAHM, some part time at work, some full time....and you wouldn't know which was which from the children. Everyone has pretty much the same worries about their kids and no path is easy.
Do I feel guilty? Yes. But I feel guilty about many things - the fact that DS1 eats so many fish fingers, the fact that I haven't taught him to swim yet and so on. That's motherhood. 