i'd have to agree with spokman, if you can utilize someone elses trainer,(paying for gas yourself), then it is a great way to learn. the cub is easy to fly, once you have down the basic controls and concepts of r/c flight.
but it makes a poor trainer. how much money do you have available? alpha's run about $300 for everything{arf-engine(mounted),servos(pre installed),gas tank(pre installed),radio, landing gear, etc..

in other words it's ready to go. usually they run $300 or a little less. i picked mine up for $240 new in the box from my LHS. that plane trained me twice(years apart), and go with an instructor.

the best route if available it to use someone elses trainer, then less stuff to buy, and you are almost garunteed to have an instructor!!! lol.

welcome to the wonderful world of r/c flying. it is good that you are getting into it at a young age. i got into it when i was 14, and am still loving it. you'll be a pro by the time you hit my age. keep practicing, keep flying, and never get too discouraged with you abilities. it takes a long time to fly well, and most people never master flying r/c, but it is still fun to try!