Just a piece of advice. When you do find a proper boxing gym it would be wise to humble yourself a bit and not walk in there and tell them that you've already taught yourself everything and are ready to spar.

Chances are that if you've been 'home training', no matter how careful you are, you've developed some bad habits. It's best to show up to the gym as if you've never thrown a jab in your life and ready and WILLING to learn and absorb everything your trainer tells you. The slowest progressing boxers at my gym are always the guys who think they already know everything.