Got it. Well, does your area have a program where knowledgeable police officers take kids off the street and teach them (among other things) boxing? I think it's sometimes called a Police Athletic League. Perhaps the coach would teach you privately.
Or is there a recently discharged Marine or two around? Probably other services have a good unarmed program as well, but the only one I have personal knowledge of is the Marine program. Maybe a USMC recruiter could introduce you.
Talk to the management at your local VFW. Any disreputable bars? A bouncer might be willing to teach you.
Good luck.