Suppressed 22 toys with iron sights is where it is at.
I start people out just simply shooting. Showing them grip only and have them fire rounds to get used to the recoil. That's it. They need to get used to and know what the pistol is going to do so they don't have to worry about it while trying to do the other things like trigger control and aiming.
Load them 1 round at a time. You don't want someone getting scared and firing a number of rounds anywhere they point their hands.
After some of that practice, when they get to actually aiming in and shooting, I stand next to them and actual say to them "front sight front sight smooth trigger smooth trigger" slowly over and over again until the gun goes off. Calling audibles work. To this day I even say it to myself. It works.
And do not tell them the gun firing should surprise you. WRONG. Anyone firing a weapon better know when that thing is going to go off. That's called being in control.
Always always always stand close/next to them and do not be afraid to grab their arm/hands, etc... if they decide to go on a tangent.
I could keep going, but don't feel like it.
Good luck.