Agree with all of the above. Some have it and some don't. The knack to pick up flying quickly I mean. Get an instructor that is calm and patient. RC planes are not like cars. Cars will usually hit something on the ground and stop not far from where you are. A plane can travel for miles if control is lost and destroy property and injure people. I'm not rying to scare ya, just tell you the facts about flying around 4-30 pound bullets you hope, under control. The key thing to remember they are not toys, even though my wife thinks they are. Not just anyone gets in a real cessna and takes off by himself. The same holds true for RC planes. Once built they must be thouroughly inspected prior to flight, just like the big ones. Radio gear must be checked and batteries must be in good condition. When I started in this I learned not to push the batteries threshold of capacity. Not much scarier than a screaming plane heading toward you or your buddies with a 12 inch food processor strapped to the front and not responding to control inputs.
Find and club and some help. Be weary of the instructor that can't seem to wait to get your plane in the air without inspecting it like an FAA inspector. If it isn't right you don't fly. Just ask yourself if you would fly it if it was a real plane. If you wouldn't, than it is probably not too safe to fly remotely so fix what needs fixing and come back another day. Best of luck and be safe