Ap is actually not auto program, it stands for aperture priority. I believe E or Easy would be auto mode on your camera. Ap is actually a great mode to start with. The aperture is the size of the whole letting light in. One of the things that size of hole affects is how blurry your foreground and background are. It takes a long time to figure it all out there's no rush to have it figured out overnight. I suggest you use Ap and Tv until you really get a better understanding. Tv would control shutter speed which will stop movement if necessary or blur water motion if desired... When you start out you tend to over edit photos, I still do it. One day you will learn to use selective color and then everything you do will have selective coloring until your realize how tacky it is. It's a learning process...
Look at your camera. It's M, Av, Tv, P (Manual, Aperture value, time value, program) on Canon, and M, A, S, P on Nikon (Manual, Aperture, Shutter, Program). Nowhere is there any reference to "AP" being for 'aperture priority.'