i know this sounds too simple but first find out what is necessary to train ccw students in your state.
Most states are similar but generally being certified by the nra to teach basic pistol and having passed a state given ccw training class are the minimum requirements.
Then get your insurance through the nra program (cost around $300) and your ready to start teaching.
Good luck and stay in touch with this forum as you proceed, no need to re-invent the wheel!
Safety first inc.
Salisbury, n.c.