Okay. Full disclosure here, I teach in the class I'm about to tell you about.
Google or call
Murray Yacht Sales, Inc. They have a series of classes on Beneteau First 7.5s, and you can call and sign up. They start with basic keelboat sailing, and go up from there. Not very expensive, look at the web site.
The Southern Yacht Club also runs some adult ed. sailing classes. The summer session's already underway, but there's a fall class, i think, in Sept. Call them for details.
I've taught in both, they're both good. It's a good lake to learn to sail on (even though it drowned us) and you won't regret it. Eventually you can find a ride crewing for boatowners in races.
Best of luck. This is a good town to learn sailing in..