Get a few bottles of plain saline nose-spray for babies and a book about general baby preparation. Prepare for sleepless nights and hours of holding/rocking/swaying your baby in the exact same position so it can sleep.
Other than that, don't overthink/worry too much about it, and you'll be fine!
Also - don't forget to take a few photos! Some delivery rooms allow you to bring a camera in and one of the free nurses would snap a few photos for you. It's very special to have a photo with your partner and newborn before it's even a minute old.
Other than that, don't overthink/worry too much about it, and you'll be fine!