The controls of a RC transmitter are actually a simulation of the full-scale controls of an airplane.
When flying full-scale, you PULL the elevator back toward you (down) to PULL the nose UP.
Pushing left on the rudder will turn the nose of the plane toward the left.
Pushing left on the aileron will roll the aiplane toward the left (left wingtip will go down.
Pushing the throttle forward (UP) will raise the throttle (higher rpm.)

You want to set your radio to do the same, so that when you get a chance to fly a full-scale airplane, you will already "know" how the controls move.