Questions about potty training partially vaccinated puppy in yard where wild animals sometimes visit.

So I’m brining home a nine week old puppy in a few days and am worrying a bit about starting potty training while not fully vaccinated. I live in the country and while i have a fence animals still tend to get in our yard. Just last night i was outside looking for the northern lights when I heard something walking in our yard. It was probably a coyote as someone saw one a street away this morning. Do i need to worry about where i taken him in my yard to go potty? I plan on going outside tomorrow (it’s already dark out) and seeing if i see any signs of animal. I’m worried about the puppy possibly getting sick from stepping wear another animal has stepped. How do I go about this? Also do I need to worry about my shoes bringing in stuff when I go to the pet store or the vet? I’m not a first time dog owner but this is my first time getting a puppy.