Leebo's suggestion, a local REI class, is another fantastic option. They've got free beginner bike maintenance classes, available to the public. They're intended for absolute beginners, and there's nothing to lose!

They have a location in Brentwood, TN (not sure how close that is, but may be worth a short drive if you've got nothing better to do). It looks like they've got a free bike maintenance class going on this evening at 7:00 PM, although it seems to be full. They've probably got another one coming up within the next month, though. I'd keep checking.

Brentwood REI Events:
http://www.rei.com/stores/64