The hardest thing to learn when flying RC aircraft is the control perspective. Flying away from you, all the controls are as expected, up/down, left/right. Flying towards you, left/right is reversed, up/down is the same, etc. Flying overhead, well that's yet another story (not usually a safe thing to do, but will probably happen to you sometime while you are learning).

The good news is, an RC flight simulator will do an excellent job of teaching you this. Get yourself a sim, RealFlight, FSone, etc., or even the free sim called FMS is better than nothing. Once you learn to fly comfortably towards you, away from you, overhead, inverted, etc., you will learn much faster when flying the real RC planes with your instructor.