Yup, wife and I just had our first child. It is a whirlwind, but it's fine.
A good friend gave me this piece of advice, "Humans have been procreating and propogating successfully for thousands of years. Let nature take its course and keep your big brain involved in other stuff and you'll do fine."
I'm 39 and my wife is 34, we're both working full time in demanding careers, so saying it's an adjustment is an understatement. That said, I can say that all you really need is to ensure mom and baby are in good shape, so doctor appointments and prenatal vitamins. Help her where you can to reduce the burden on her as its a ton of work to carry a baby for 9 months.
Try to enjoy the time before baby arrives, go out to dinner sans baby, go for road trips, etc. it's more difficult to do so after the baby arrives and it's just different but in a good way.
Don't go crazy buying too much baby stuff, all you need is a crib and a stroller/car seat. If you have a baby shower, you'll get plenty of diapers, clothes and diaper changing stuff. If not, most of that is available second hand and in consignment shops.
Also until you have an idea how big the baby will be, let alone it's sex, it will be hard to buy clothes for them.
The hospital will have diapers and the like and you can take most of it home with when you leave, they charge the insurance for it all anyway. So make sure you have some stashed away at home and you'll be fine for the trip home.
Try to get the car seat fitted into the car BEFORE you go to the hospital. That way you'll not have a stressed and sleep adled brain attempting to install the seat base and adjust the car seat, etc. Hospitals rarely help with this part, so read up on it, watch videos, etc.
Amazon Prime and similar solutions are your friend. Getting out to go shopping will be more involved with the baby.
Bottom line: it's a wonderful thing and the hardest thing you'll ever do in your life, but once you hold your baby in your arms and they grab your finger, you'll never want to put them down.