Take him squirrel hunting so he can set & wait on one. He can hit a squirrel & eat it that night.
Let him go w/ you if he wants to, walk beside you, find an opportunit for him to shoot at a target of some sort.
My kids were taught that they could shoot anything they could show Dad they were big enough & strong enough to handle safely.
Set him up a sawhorse w/ a pad on it. .22 at cans on another sawhorse at a range he can hit them
I got it. I Got It. I GOT IT. There are much better ways to start one.
My .02cents & some think it worth about half that.