Check out vets in the area; perhaps you know one you like already. If not ask your breeder, or look for advice from friends in the area.
Set up a wellness visit in advance for your new pup or your older companion. This way you get to know your vet by watching how he interacts with your newest friend. It also gives your vet a chance to check your pup over; this can give you added peace of mind.
At this time, share the schedule of inoculations your new pup already has with
your vet. He will help set up the schedule for future visits.