it’s probably going to be years before i am able to get a dog but i want to start collecting stuff but i don’t really know what to start collecting. Also I was thinking of doing some doggy training classes when i do eventually get my dog

Perhaps instead of collecting, you could just start saving money? Dog stuff is dependent upon the actual dog’s size, breed, and looks. Unless you’re 100% positive on what kind of dog you’re getting, it wouldn’t be beneficial to have anything until the dog is actually with you.