You could learn to fly on the Cub , if you have an instructor. I would not recommend it, as the cubs don`t handle hard landings as well as a trainer and if this is a nice Cub , it won`t be by the time you learn to fly on it.

Go with the Towers trainer, use a coupon and you should be able to get it freely cheap. I have owned the Tower 40 size trainer , good airplane for the money.

I would do a search on your radio and try to down load the manual. If you hook up with an instructor , he will preflight your equipment .

Good luck