There are four rules if you go with Thunder Ranch, 3 if you go with the NRA.
I almost never use the NRA curriculum.
Don't overwhelm him.
A good goal is to shoot a semi-auto .22 without an injury.
Teach the rules of your choice, teach one stance, teach one range routine.
Teach clearing and loading one type of weapon. Don't mix semi-autos with revolvers in the first lesson. Best to stick to one weapon the first day.
Go to the range, demonstrate the sequence again.
Stand behind him on his dominant side, and watch the muzzle.
The only thing that matters is where the bullets go.
Everything else can be another lesson on another day.
"Huh?" --Jammer Six, 1998