I think that the biggest step for you will be to come to terms with the fact that nothing will ever be the same. And I say that, knowing that you won't fully grasp that until the first time you see your child. And then you'll relearn that with any subsequent children! For me, the first time I've held each of my children, I've been completely floored and awed and instantly in love. All of a sudden, here is a person on earth that I would die for. It's amazing.
You and your wife are about to be very tired. Your son will need to be fed, changed, and burped ... and sometimes it will seem like there's no break in between! I think establishing very regular patterns is a good thing for everyone. Same time to bed, same time to get up, et cetera. It will take tweaking and modification as time goes on, but talk to your wife on a regular basis about how the patterns are working or not working, adjust, and keep on going. For us right now, the pattern is that she goes to bed earlier and I stay up with the baby, letting her get some solid sleep until the baby needs to be fed again. We're still tweaking the parameters, and we've been so fortunate to have my wife's mother staying with us, and she's a huge help, so once she's left, it will be another adjustment.
I suggest using a cosleeper. Having the baby sleep with you in the bed may very well mean that you don't sleep as well because you'll be paranoid that you'll roll over onto the baby. Or worse, you'll roll over onto the baby! A cosleeper puts the baby conveniently close.
Crying is okay. Let him cry a little bit. The natural instinct is to immediately feed / change / console. If you are solving his problems a microsecond after he announces there's a problem, then he'll expect that every time. If he's allowed to cry a little here and there, he'll understand that mom and dad will still take care of him. It will ease the transition to the day when he's sleeping in a crib, not in the same room (also highly recommended).
Take ALL advice with a grain of salt. What works for me won't necessarily work for you. Be ready to try different approaches. Note that this may be in direct conflict with establishing regular patterns!
Best wishes to you and your wife, and if you have any questions you want to run by a new dad (before or after your son is born), please feel free to reach out, my email is in my profile.