I was young when I had DC1. I looked much younger so got lots of nasty looks/comments over the years.
I had few friends and no career prospects anyway (realised too late my degree didn't qualify me for any actual jobs!) so having dc didn't stop me travelling/ going out on Saturday night because I had nobody to do those things with anyway.
I was on my own which was harder. Months of no respite was tough. But when I read relationship threads in here it wasn't as bad as having a man child/ cocklodger in the house!
I was restricted to doing 9-5 jobs as I only had 8-6 nursery for childcare but still earned £23k at 24 in the noughties.
(Never got a penny from cms)
I got £190(?) pwk tax credits that paid for the £200 pwk ft nursery.
Got a mortgage with almost no deposit and the bank added my tax credits to my salary to offer me a bigger mortgage. So 6x my base salary. The mortgage was £300 pcm, about half of what my friends were paying in rent at the time.
So financially it worked out really well.
There were times when went back into poverty but rode through it as a homeowner as that gave me access to cheap credit.
DC now at top uni. Motivated to work hard to earn well themselves.
It looked like the wrong decision at the time. (I had a lot of pressure from everywhere to abort) But given how it's worked out we seem to have proved them wrong.
Friends who have very young dcs now don't seem to have very happy lives at all.