Other than having an uncomplicated delivery and healthy baby, I think I'm most nervous about two things (which will probably seem silly in a few months from now).
Giving a newborn baby a bath (I know sponge baths will suffice for a little while) and dressing a newborn.
I have watched many many babies in my life but I don't have a lot of experience with newborns. I'm terrified of their floppy little necks/heads! It's going to take me forever to get her bathed and dressed...