In an ideal world, concealed carriers would have brown belts in Brazilian Jiu-Jitsu and be B-class USPSA shooters. In reality, the average person can still become a competent gunfighter with the guidance of a skilled instructor.
Gun fighting at arms length is very dynamic and requires a different set of skills and tactics than when fighting when more distance is available. The Extreme Close Quarters Gun Fighting class provides a foundation for those fighting skills.