Obi, 17, hasn't been seen this season after making his breakthrough last term.
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"When he was playing 18s football, it was men against boys. He was bullying people, it was so easy for him," Jones told Metro courtesy of FreeBets.com.
"I think he needs to understand where he is at in his head and figure out what his realistic expectations are. Is he going to play every game? No. Is he going be on the bench every game? No.
"But what he needs to do is make sure that when he is called upon, and there will be times he is called upon and he will get chances, that he is ready and happy. He has to be professional and be ready because if he is they will have one hell of a player."