Gun safety course and some basic pistol shooting certification either through the NRA, or some other effective sponsor, as prerequisite to the CHL class. The private citizen would be responsible for fees, as they are for the CHL class.
Fear of "opening the door" is an excuse to do nothing.
That is one of the unfortunate issues with firearms training, there is no legitimate certification or standard for instruction. Every yahoo with a beard is peddling his proprietary snake oil technique.