Well, seeing as you're just "learning" to paint, this is pretty impressive! The solid and blocky colors give it a very rough and earthy look, and also follows a very impressionistic style.
I'm not really sure if I can offer much in the way of suggestions, though. It's very visually impressive and really catches the eye. It's also very simplistic so it doesn't overbear my eyes when I look at it. In the case of this painting, that's a very good thing. You really captured the emptiness of the cave that this bear is walking into, and all that empty space that doesn't have a lot of clutter helps strengthen that.
I think this is really good since I am a fan of the art of Bastion and Transistor. The bear is well drawn, the wide space is portrayed in such a way that the bear doesn't get lost there. I like the earthy colors and the composition; it portrays the natural terrain adequately. By presenting just a few elements, it helps the viewer to understand the image; there is no need to show a lot of things. Everything is well integrated as a whole. If you keep drawing like this, I know you will get far. Practice makes perfection