I had never held a baby before my own. it is scary. but it is nice too, a new start for you both, you both need to get to know each other and that's ok. I don't think it's any easier if you've read a million books on babycare, and to be honest I think the people trying to sell us stuff take advantage of this feeling of uncertainty (if I buy THAT bathing seat, then my baby definitely WON'T drown etc.)
I didn't leave the house for 3 weeks with DD1, I just needed time to adapt. everyone's different.
it will be ok. you will make it ok. and then you will get to be the person that makes it ok for your child for the rest of your life x
if you are worried, i'd recommend reading lots of books that make you happy in general rather than baby-specific. (jaqueline Wilson/roald dahl)
or go to your library and take out a few books about stuff to do with toddlers/older children (eg craft stuff, baking, party cakes, fun games), you can photocopy/take notes on these in a pretty book (excellent excuse for a trip to paperchase!)
focus on thinking about the fun things you will do with your child+all the traditions you want to start as a new family. this is much more fun than desperately trying to learn how to stop a baby from choking, it still feels like you are "doing" something, plus, when your child is a toddler this book will be great as you won't have as much time to read up on things.
I hope it all goes well for you and congratulations on your pregnancy