Just to offer an alternative view, it is possible to learn to fly RC planes without an instructor or buddy box, etc. I know, because that is how I learned. I call it the "learn by doing it wrong" method. The way it works is, flight is attempted, something goes wrong and the plane crashes. The post crash analysis determines what went wrong eg. lifted off the ground before flight speed was attained, thus the stall and crash. Then the pilot learns not to do that anymore. The plane is repaired (or replaced) and flight is attempted again, resulting in another crash, eg. overcontrolled ailerons on the turn and rolled into the ground. Same process repeats, learn not to do that any more. Repair/replace, and so on. Eventually, one runs out of new things to do wrong, and the plane goes home in the same condition as it left. Doing the same wrong thing doesn't count as learning, only as crashing. Thirty five years ago when I was doing all this learning, it was typical, as models were built by the modelers then, so repair skills were readily available. You built the model, you repaired the model.

It can be done.