Before you go out and buy a plane and radio, spend some time gettting to know the people at your local flying field and hobby shop. They can recommend a plane for you to start with and in most cases know about used planes and radios that can be purchased very inexpensively.
Since I have been a member of our club I have seen some amazingly good deals on planes and equipment, especially high wing trainers. Many new flyers sell thier trainers and radios as a package deals in short order so they can go on to other planes and computer transmitters.
This weekend my son was given a nice plane by another club member. Seems he was cleaning out the the garage and decided he needed to get rid of some planes for more room. Instead of selling them he gave the surplus planes to new club members for thier 2nd planes.
Look around before you invest into something new, good deals can be found.