Two experiences of attempted RC Flight (late '80s)....
1) Built a 4-Ch PT-40 plane (w/Ailerons), big wheels for the backyard grass, etc. Taxied it around for a while, felt OK to take off. As soon as it lifted off the grass, it went up & right, somehow it didn't stall and it didn't hit the barn.... Tried to trim it out, never quite got there, and it kept getting farther and farther away, so I killed it and watched it glide away. When I saw it in the neighbor's pasture/woods, it was on the landing gear! When I picked it up there was a significant dent in a wing leading edge. I sold it for what I had in it and that guy flew it for years, until he buried the prop in the dirt. I probably would have been OK if I had someone experienced fly it and trim it out, first. It was a solid build.
2) After the PT-40, I built a Concept 30 w/OSS 0.32 ci Nitro, 6 ch Futaba w/Gyro Yaw, etc. I did get where I could hover around the yard, but never really learned how to "fly" it. Also sold that one for what I had in it.
Did recently buy a Goosky E2 1/35 UH-1Y but haven't tried to fly it yet. I think that Cleetus would be a PERFECT trainer!