Get a Sig or Goldberg Cub.
Has your second plane, these will teach you about tail-draggers, snap-rolls, and spins!!
Most importantly, these cubs will force you to fly with your rudder, vastly improving your skill set as a pilot.......

The Goldberg Cub builds super fast and you'll be up flying it in under a month(2 weeks), allowing you to build your more advanced( high speed) stick or Somthin Extra while your flying your cub....