Its better to ask a lot of questions than to ask none and maybe miss something.. I totally understand. If the growling/barking really bothers you, tell him NO sternly, or put him on a "time out" to teach him not to growl at you. Puppies will do this when they play with other puppies, they should learn not to growl at you.

Just wait until you go through the puppy biting stages ... thats always fun!