You know OP, if I had waited to have children until I was "ready" I would still be waiting.
I never felt particularly maternal and certainly not domestic. Had a fairly high-powered career, long hours, tons of travel, nice paycheque. However, I knew I wanted a "family" in the abstract. I couldn't imagine being 70 and it just being me and DH (although he is lovely) around the Christmas dinner table. So basically I had kids because I wanted grandkids!
Had DD1 when I was 33 and DD2 just shy of 36. Had crippling PND with both of them and it was HELL.
However.
My DDs are the light of my life. They are beautiful, clever, kind, fun, funny, perfect. I did not know I was capable of love like this. I would not change one single thing about being a parent, being their mum, even though yes it is still hard sometimes.
I think everyone's journey to and through parenthood is different, and you need to find the path that feels right for you. 27 sounds a bit young to me, but then again I have a very close friend who had all 4 of her kids by the time she was 26!