He is young yet, just get into a routine of him stepping up then stand and talking gently to him then place him back on his cage. As times goes on try walking a couple of steps further away so the same talk to him then go place him back onto his cage. Maybe give him a treat - something he likes to eat,maybe a piece of fruit or unsalted nut.
It just takes time and a lot of patience.
It just takes time and a lot of patience.