@donc Thanks for the info
any advice for the diarrhea you mentioned?
Don't feed them for a half day or a day. They'll get over it soon enough. If it persists, which it normally doesn't, they may need some antibiotics. The problem is that puppies are curious and lots of things will make it into their mouths. They're faster than you are so even if you're paying attention they can snatch something and start chewing before you can react.
You should find out what the breeder is feeding him/her and stay with that at first. Even if it's not your first choice you don't want to change food abruptly.
Oh yes, and keep in mind that a half hour walk with a puppy will be a much shorter distance than a half hour walk with a dog. Everything is new and everything needs to be inspected! The puppy may also not be accustomed to a leash, so that may also take getting used to.
Rest assured that no matter how prepared you are it's normal to want to slit your wrists sometimes! Honestly if you keep them contained when you can't supervise them and crate them when you're out you can avoid 99% of the problems.