What am I going to do with a baby?

Less that a week away from meeting my LO, the thought that it’s actually happening hit me suddenly and I’m panicking. What will I do with a baby? My husband and I did our homework on baby care, sleep, breastfeeding, everything that the baby might ever possibly need is purchased and prepared. We have a great relationship and a good financial situation, the baby was planned, but I still feel like I might somehow mess it up.