You can shoot in IDPA, USPSA as unclassified until the cows come home without issue. Some clubs will let you shoot without being a card carrying member of the discipline
NRA Life Member, NRA Range Safety Officer, NRA Certified Pistol Instructor, IDPA Safety Officer, USPSA NROI Range Officer,
ICORE Range Officer, ICORE Match Director
As you are, I once was, As I am, You will be.