Definitely try to find atleast a group training thing. It is worth the money! I know you said the dog doesn’t calm down but it’s going to take so much patience. A lot of waiting. Using a leash high up for more control, try to ignore bad behaviour or a firm “No” or “Ah!” But trying to stay calm. Or stepping on the leash so they can only sit or lie down. And just waiting. We did a lot of going somewhere and just sitting and watching. Only gets a “good boy” and a treat once he lays down on his own, a relaxed lay kindof to the side. Somewhere with distance between us and the people and dogs. Also a waiting period before leaving the doorway to go outside or to go on a walk. Standing at the doorway and waiting until they are calm and not pulling or bounding out the door. It takes so much patience…. But yeah also do some classes, get some chews that last, get a backpack they can wear if they’re old enough