Welcome to the forums. That's cool that you got certified in the Black Sea!
There's a number of us from Tennessee on here (I'm in Knoxville). For a landlocked state, Tennessee actually has some decent opportunities for blowing bubbles -- while flooded rock quarries aren't the Caribbean, they can still be fun dives and are a great way to practice skills and get more comfortable in the water (which usually leads to better air/gas consumption).
I'm happy to meet up sometime for quarry dives. I'm not a drysuit diver, so now that the weather is cooling off I'll probably only dive at Gray Quarry (it has aerators that eliminate the thermoclines) until about mid-November, then I'll probably only travel to dive warm saltwater until mid-May or so when the quarries warm up again (then I'll dive at any of the quarries).
In addition to the
SouthEast U.S. regional forums here on ScubaBoard (which are not super active forums) there's also a
Tennessee Scuba/Free Dive Buddies group on Facebook, which is pretty active with people looking for dive buddies in Tennessee.