RE: RF G5.5 Plane
You can go to the swap pages on the realflight site and look for trainers.
I would get the plane you have the model for and use that.
Once you get familiar with the program you can change the
parameters to match your plane, like weight, prop dimensions.
I found flying with 0 wind was not much help because once with the
model flying in wind you start to see how different the model flies vs the sim.