RE: RH or LH bow
Start him out right and find out wich eye is dominant and that is the bow he should shoot.If he is RIGHT EYE dominant and left handed,he will MOST likely shoot better if he shoots RIGHT HANDED.
This is not hard to check.One way is to walk out about 15-20 feet and tell him to make a circle with his fingers,with arm extended, look through that circle and put your head in the circle.You can see which eye he is using to center your head and that will be the dominant eye.
This may save years of frustration and headache if you start him out this way.If you are lucky,his eye and hand dominance will be the same but that isn' t always the case.
My daughter is right handed and left eye dominant and I started her shooting BEFORE I could check her eye dominance and now am in the process of switching her over.