I'm sorry we have you worried.
If you get your pup from a reputable breeder who does testing on their parents and the pup is at least 12 weeks old when you get it and you don't push too many vaccines and hold off on the rabies for as long as possible and you watch for hypoglycemia issues, all should be fine.
Yorkies are fragile pups and there are lots of concerns but I knew nothing about any of this when I got Ellie (except maybe hypoglycemia) and she had no puppyhood issues.
Just do the best you can and I'm sure things will be fine.