I would take the scope off in the begining so he will learn site alinement
and the proper way to hold the rifle.
You will be surprised how fast he/she will learn.
My son started with a BB gun and the first time I took
him to the range I set him up with some cans and turned
him lose. After a while I noticed he wasn't shooting cans
any more and ask what he was doing. His reply was " just
shooting dragon flies"
So let them learn with iron sites first then later put the scope
on for hunting. If you start with a scope they won't like iron