I went with gas plane, I would hope you mean a conventional high wing trainer type. I flew the wings off my firebird xl and found it to be alot harder to fly than the trainer I am using now. I don't think the firebird prepared me for multi channel flying, you will find that when you step up to a 3 or 4 channel plane that there is alot more to do and it is alot more fun to fly. You have however gotten through the basic reversed control stuff, now you will have to get used to throttle controlling the speed and elevator controlling climb and descent. and either a rudder, ailerons, or a combination of both to turn.

However with a nitro trainer you will need a to do a few more things to get airborne, like finding a club, joining the AMA, and getting an instructor. Flying with an instructor will prove to be a great way to learn and alot cheaper than trying it yourself.

Whichever way you go Good luck and keep us posted