EC,
Welcome to the campfire. If you can find someone local to help it would be a good start. Couple of things, start with a longer bow for stability and to accommodate your draw length smoothly. Even for a big guy, start no more than 45# or even a 40# bow. If measured at 28", it will be about 5 lbs heavier at your draw length. And besides target shooting, get some judo points that allow you to wander the woods shooting at leaves and pinecones at unknown distances - probably the best practice around once you get the basics.
I don't mean to squelch your enthusiasm, but unless you turn out to be incredibly talented, I would not plan on hunting this season with a traditional bow since you are starting from scratch - your goal should be to take some time to find the right gear that fits, get it tuned well and practice, and be ready for the 2008 season. This really isn't something you can pick up today and hunt in 2 weeks. But even the learning process is addictive.
Keep asking questions here, a lot of good info. Steve