I was 19 having dd1 and 22 with dd2. So no, it’s not too young at all.
For some people it wouldn’t fit into their life plan to have a baby at that age, so for them it would be too young. A lot of people want the whole marriage, house, successful career thing before they’d even consider a baby. Nothing wrong with that.
I’ve always been a bit more of a let’s see how this pans out sort of person. So when I got pregnant with dd1 at 19 I wasn’t terrified I didn’t even think that I was too young at all. I always knew that I’d cope and things would work out.
So now I’m 34, still with the dds dad. We own our house, have decent jobs and I’m about to start my degree just as I’ll turn 35. I like the fact that I’m younger than most of their friends parents and appear to have more in common with my dds than they do with theirs. I love that when dd2 is 18 I’ll still only be 40.
A lot of my friends and colleagues who are around my age are just having babies now. They seem to be finding it much tougher than I did when I was young. But then they also have more spare cash than I did. So there’s plusses and minuses, I’d say whatever's right for you is the right thing to do.