Thanks @siggy47 for this sub!
I can now post all my questions regarding raising, training, owning (I don't like to say I own a living being) a dog!
I tried to get some more experience with dogs by offering to the local animal shelter to walk their dogs. But they asked how much experience I have in walking dogs and I said not much. Then they said no, most of their dogs aren't easy to handle.
So please, this is like a life goal to me: How to best approach raising a dog one day? What's the best environment for a dog? What should I look out for during my next move? Should I get a trained dog first or a puppy?
Do dogs usually don't need another dog around because they see me as one of their kind? (or probably rather, themselves as the same kind as me)
IIRC you shouldn't raise cats alone, even though they pretend like they are not social, they need another cat to ignore.