You don't say how old he is, so just let me say that if he hasn't had all of his shots yet, he shouldn't be going for walks. That said, assuming he's had all his shots I would start with just going outside, on leash, sitting and letting him look around and get comfortable with 'the big scary world'. Take treats with you and reward him when he's calm or takes an interest in something, but not scared. Let him walk away a few steps call him back to you, even give a gentle tug on the leash and then reward him. Once he seems to not be nervous about that walk on a little ways, stop while he's calm and reward him. Just work up the distance until he starts to see nothing is going to happen. Be very aware of all that's going on around you. Watch for anything that may come at him fast or loud, turn him so he can see it, reward him if he stays calm. It would also help if you have a friend or family member that has a 'been there, done that' dog that can sit with you and show him there's nothing to be afraid of.
The anger issues sound like pure puppy play to me. Gracie Ruth & Yogi both do things like this to their toys, to Boo (poor sweet Boo
) to each other. Seriously, they sound like a pack of wolves tearing the flesh off of a fresh kill some times.
If he seems scared when you tell him no, it could be because he knows that No means he's done something wrong and he's confused because all he was doing was playing. Try joining in on his play instead of telling him no. Look at how puppies play all rough and tumble, snarling and growling. It's part of their make up as a dog. I will play with G & Yogi like this and they love it! I always end with calming them down with some quiet hugs, tummy scratches & kisses. They may run off and continue playing rough with each other, but "our" play session ends with loving not 'fighting'.
The 'zoomies' after bath time is pretty universal for dogs. Nearly every dog I know does this. Not sure why, I have my ideas, but just know that it is very normal and enjoy it. Because is sure is fun to watch them do it.
All and all it sounds like you have a very normal, very smart, very Yorkie boy.
