What you will want to do is this:

First of all, build the "Sport" wing. The "Beginner" wing has too much dihedral.

Second, build the ailerons into it. Add a servo to them, but if you want to learn with 3 channels, just don't plug that ailerons in and plug the rudder servo into the aileron channel - this way, you get used to turning with the right hand - that will come in handy when you plug in the ailerons.