In Georgia, there are two pork-only sanctioning bodies: MBN and GBA. If you want to do other meats, you're looking at KCBS and FBA. KCBS has the most events in our state, and many of these are qualifiers for the Georgia BBQ Championship. Step one if you are interested in KCBS is joining the organization - then you'll receive the "Bullsheet", a monthly magazine with lots of helpful information.
We give inexpensive classes designed for backyarders looking to move up to Pro BBQ. You can PM me for more details. If you're not interested in attending a class, consider picking up the book "Starting the Fire" which is primer on starting up a new BBQ team.
Good Luck and welcome to the world of Pro BBQ!
Johnny Mitchell's Smokehouse Championship Cooking Team, LLC