As long as you ae not flying a 50cc gasser in your back yard (unless your back yard is a AMA field), you should be ok

Learning alone is ok, and once you join a club, all you would have to do is prove that you know how to fly. I agree with Jester, that you have the hardest part behind you. Keep practicing, and when you feel like flying something bigger/hevier, or want to fly with others, then join a club.

Hubert