Kinda slightly terrified to give birth

So I’m 19 about to be 20 and I’m currently 16+3 week pregnant with my little girl. I couldn’t be more in love with her, me and my fiancé are super excited, but I’m kinda scared well maybe terrified is a better word. I have always wanted kids and was over the moon when I found out i was Pregnant, me and my fiancé both have really really good jobs our own place and room for her& health insurance I’m not concerned with the financial part of bringing her into the world I’m more scared of once she’s here what if we don’t do something right, and I know being new parents we will make mistakes, i know I can give her the love and care she needs so that doesn’t scare me as giving birth does and it keeps coming into play in my horrible pregnancy dreams, I guess what I’m wanting to know is what eased your minds when you had fears?