I don't have any first hand recommendations but I remember our local indoor shooting range (Baton Rouge - Precision Firearms & Indoor Range ) had instruction classes for shooters ... Above and beyond Basic Shooting ... I would see the classes taking place on the scheduled nights .
Call your nearest indoor range and inquire ... I'm sure they would have information on classes and instructor's who provide classes .
Precision's website advertises classes and advanced training ... I'm sure a range near you offers similar training , it would be the first place I would check .
Gary