RE: which trainer???
Losi24,
The RCM trainer is fine.. However I think given the fact that you don't seem to have a proper field or help that your investment is going to wind up as a pile of sticks in a matter of seconds!!!!!!!!
Take a step back and reconsider the GWS Slow Stick its your best bet for success given the Info you have provided IMNHO
PS Don't take any .40 sized Nitro plane to the local baseball field untill you have become a profcient pilot even then its not the best idea!!!!
The slow stick will allow you to use your radio and std servos. You will need an ESC (electronic speed controller) 1 or more battery packs and a field charger that can recharge them.