Great suggestions. I learned to fly in a J-3 and the models behave just like the real plane. Ground loops on a narrow grass runway were really thrilling. My dad was my instructor and was pretty patient with my first couple of attempts. Remember not to jam the throttle all the way, a J-3 shouldn't take off at full throttle unless it's on floats. Flying it will be good practice for you using your left hand on the rudder both on the ground and flying. It wont' skid through turns as much if you coordinate rudder with aileron. You could program a mix in, learning to use rudder is more fun. Rudder is important for crosswind landings. You will have a ball learning to slip a Cub in for a landing. Finally don't ingnore the advice about toe-in. It will make life easier.