How do I use camera controles.

Is there a way to set how fast I can scroll? My camera will randomly reset zoomed WAY far out from whatever I am working on. I then have to spend about a minute scrolling my mouse wheel, or holding down an arrow key to get back where I was. It was annoying at first, but now it is unbearable. There is no way that this is right.

As of now I have no objects in my Scene as I am only doing the terrain.

You can hold right mouse button with shift key(shift speed up movement), and then you can try moving with W,S,A,D, also you can use F key to focus on object. Good luck!