I'd say temper your expectations on this one. Sounds like he's got the skill set of a safety, but he heard NFL corners make more money so he insists on playing there. Supposedly in HS, his coaches mostly just turned him loose and let him excel on raw athleticism, so he came in with tons of potential but not much skill, with some scouts saying he was way overrated. When he finally managed to hit the field, he wound up playing timid because he didn't actually know how to play corner.
He'd probably be better off in a safety spot where he can focus on being a ball hawk. If he still insists on playing corner, well...