Hey! Wellcome!
First of all: I'm no pro! But I like painting rocky stuff and I've been in your shoes mate!
So.. The overall picture looks nice. I'm not sure about that cat as a seccond focal point, makes the eye go too far away from the main focal point. You already have some good negative spaces on the background and space beetween rocks that make the image breath, thats good. Water gives life to it, cool !
About the LIGHT: you could make it more ''one direction'' (sorry for broken english), right now its good, in a way that gives a warm peacefull mood to the scene, but it kind of spread all around, like the rocks are almost glass and light is bouncing all around. Just be more solid with light direction and it will be fine.
About ROCKS: from what I see, you thinking of rocks as brush strokes, that are some how just there in a organic form. I remember I use to think like that. ''Gonna make a bunch of strokes here and it will give the impression of clumsy rocks'', but the end result is not what i would expect. Everthing started to make sense once I reduced the information, and started thinking rocks as shapes on top of each other. Think more like big blocks of rocks, that you will put some detail on it. And not a bunch of little details that together make a big rock. Does that make sense for you? Sorry again for broken english
Keep up the good work!! Have a nice weekend.