IAmA Black Goat of the Woods with a Thousand Young. My eldest just started dating. Help?

I've tried to give her advice, but she doesn't listen. I know that things have changed since I was her age, but I'm still so scared that she'll end up like me, having her first children before she even really understands her own body.

She has so many opportunities that I never did, and I just don't want her to do anything she'll regret later. How do I get through to her?