Welcome! I bet he is cute! However: If you are afraid of a 7-week puppy, please don't get a second one until this guy is truly mature and well trained. Yes, even puppies growl in play and in back talk. If you do not want him to learn to wander away, do not let him loose off lead in an unfenced or large area.
A good puppy class will let you see other normal puppies. It is a good foundation if done well.