I don't really wish I had known too much more- other than about birth .
But I do know, now that I am a parent- that I am really glad I had all those me years before having my son.I travelled a lot, had a lot of alone time.
Because I was surprised a little by how much more having a kid changed my life than I thought it would. when you have a kid it takes so much focus and attention on them. It really becomes a lot about their well being and you as the parent have to learn to adapt more.
It is also much more work than I expected!
I think it is really great if you can have a loving strong comitted partner to help raise the kid- if you can- try to be in a good solid relationship as the work and sacrifice of parenting can challenge a relationship.
Regarding birth- I was totally naieve. I had read only natural birthing information- I was totally in the mind set from all the books and stories I read that birth is easy, that doctors are invasive and unnecessary when it comes to birth, and if I just had a mind set that it would flow then it would be a peaceful easy flowing experience. I did not allow in my mind for any possibility other than a perfect natural home birth.
What I learned is that support around birth- having people you trust who can help you physically and medically IF somehting does go wrong- is very important. I did not have a good support team- I had only my husband and midwives that I did not like or trust, and I was very surprised by how major and challenging my birth was! I had only read happy birth stories and while those are great- I think it is important to know that birth can be unexpected and surprising, and is sometimes dangerous. I didn't even allow myself to consider those ideas. I ended up with an emergency c section which turned out really well for me but it was different than I expected.
Having a kid is life changing more than I ever expected too. But really wonderful and life enriching too!