I'm completely self taught. Get a slow stick, or two, and a simulator. Fly when ever you can and use your sim as a tool. It'll teach you orientation and get rid of your "dumb thumbs." If you have any questions, please PM me. I also can give you pictures of my home brew slow flyer that can be made really cheaply. I have attached the picture of the "foamy trainer" that I built and learned to fly with. Now, I instruct others in the joys of RC flight, I'm 27 by the way. Been flying since I was 23. 100% self taught.

My first plane was a SPAD BUHOR. Big and slow, and I could not control it. Built my "foam trainer", flew it and never looked back. My next plane was a GWS EStarter. That plane taught me how to use ailerons, I feel that it makes a great second plane. I know you wanted GAS to start, but that's asking for stress.