I am trying to figure out how to make basic texture. Up until now I just used tiles but they look really flat, and all the maps I see look like they used clouds to make the ground all bumpy, but try as I might, I can not seem to get my ground anything but flat.

Any ideas? Easy to follow tutorials? (I try to read and follow the tutorials, but some of you guys are on such a high level, I can't even follow them, and some tutorials don't show the interface of photoshop, so they are hard to follow)

Any help would be appreciated.