Well. Depending on where you live, doctor appointments differ. Where I live there's a shit ton. They check for various abnormalities in the development so you can get prepared for it etc. But I've heard that in other countries these are not mandatory and other than a few appointments you just go in once to the hospital and come out with the kid.
However if you feel anything is going bad down there, go to the doctor immediately.
You have 9 months to figure shit out, so don't worry. Get the stuff the kid needs. Bed, a place in the house. Baby monitor, sheets, clothes, a little bath tub and so on. Get the house kid ready.
If he can, make sure he takes a few weeks of vacation when the little one comes so he can help you out in the first days.
I think he's just scared. I know I was, but now I look back at myself and laugh. Having a kid is the best thing ever. It is tiring sometimes, yes, but I cannot imagine my life without her anymore.
But it is true that grandparents (your parents and his) will interfere often. And it is only natural. And it is a good thing. Believe me. They have already raised kids, so their experience is vital. For us they are our go to places when we have a question or someone to look after them.
However he needs to understand something very, very important: your mother plays the most essential role here. I had to learn this. Even if I don't like that there are weeks when my mother in law sees the kid more than I do, my wife feels more comfortable with her mom around than with mine, so it is only natural that she visits her more often with the kid and applies her advices more often. He has to accept this fact. Of course, there will be confrontations between grandparents and parents, but with enough patience you'll figure these out.
I think what I'm saying will make more sense when the time comes. Until then: don't worry too much. Things will figure themselves out. Let me know if you need anything else.