If you're smart, answer this:

Is it easier to stand on top of a clothesline, or hang from it?

The obvious answer is to hang from it because you are more stable with your weight below the line.

Same thing with an airplane - you can put all of the weight on top of the wing, or below it.

Now it's true that there are many different ways to configure a plane, and you CAN design a high wing plane that is less stable than a low wing plane, but in general, when it comes to Radio Control models, a High-wing plane will be more stable.

But as 2slow said, first arrange getting an instructor - Find your local club, go check them out and talk to the guys, they will be more than happy to help you get started. They will help you pick out a trainer, and they may even have a "Club Trainer" that you can fly. Once they see how quickly you pick it up, they may even recommend skipping a basic trainer, and going with a low-wing "Intermediate Trainer" - But again, you need THEM to recommend the trainer. There are a few low-wing models that SOME instructors MIGHT recommend as long as THEY are the ones who will be instructing you