Beginners, do not confuse overcontrol, throw, and exponential.

Overcontrol often comes from having your surface throws greater than needed. Throw is how much the surfaces move from full one way to full the other way.

Beginners often do what the previous posters have clearly described. They throw the stick too far for what the airplane needs. Or the surfaces move too far however much the beginner moves the stick.

And exponential does not change how far the surfaces go from full one way to full the other. So don't think of it as a remedy to overcontrolling. And don't think of it as affecting maximum throw. It doesn't.

It actually allows you to more finely control the surface around neutral. That will be quite useful to you after you've learned to control the airplane with some touch. You need to learn that touch and having pure control is important for that. But in the future there is an excellent probability that you will benefit from it's use. It is particularly valuable when flying thermal gliders for example. You can more finely control the elevator with it, yet you still have full movement of the elevator when you move the stick as far as it will move.

I flew today with a guy who has had trouble landing for over a year. He constantly overcontrolled the airplanes on approach. He started using exponential on the elevator and with the finer control, the approaches are quite smooth. He's actually rebuilding less. Actually got an airplane he calls, "old". But he learned the touch to fly on a basic TX and after some time made the move. He learned the basics and then added refinement.