Pediatrician question

Brianna
Im a first time mom and I'm 32 weeks pregnant this week. I'm gradually trying to get everything in order but I have no idea what I have to do about setting up a pediatrician I found one that one of our friends referd is too that I'm going to use. And he is taking new patients but how do I set all that up? Do I just call after my son is born to set his first appt? Or do I have to call way early?