RE: help with 1st plane
Why don't you wait and see what your instructor says. There may be a club trainer for you to start on while you assemble your trainer. The cessna, I'm assuming you mean the Hangar-9 ARF .40, is only OK. I would recommend a good quality trainer like a SIG Kadet LT-40. It will last for years.
While you are learning, you will be on a buddy-box which allows your instructor to take-over. They are sometimes a bit brand-specific, so it may be a good idea to wait and see what equipment is popular at your field before you go buy anything at all.
Your instructor will help you select a trainer and proper radio gear. He/she will help you set it up and trim it properly. Rely on the sound advice of the club members. They all started right where you are and their advice can save you time and money.
Welcome to the end of 'free time' and 'disposable income' as you currently know them.
Good Luck!!!
Mark