I can see the mountain, castle, lake and man. If you was to say its a wizard found the castle he had been searching for than I'd say your painting is there, but the wizard should be in a action pose that lets the viewer know something bad is about to come upon the castle. And I'd try to put a little more detail into, lets say his boots or rob. Just my opinion. Keep up the good work.
I'm not good at it myself, however I have seen improvement since I started. I would just keep on studying the structure of the body. A few weeks ago I set a goal to draw the skeleton in many poses, first I got down the basics shapes needed to form like the ribcage, then after I had those in memory I began to draw different poses. I was spose to try and fill up a sketchbook but with holidays I didn't make it, but that is where I will continue, then after that you can go back to those skeletons and start studying shapes that will help you with the arm, legs, waist, the outer shell of the body, then from there go back and start to work on detail of the human body. Then say after you have that down, start getting some reference photos and get Ideas for your character. A book called drawing & painting Fantasy Figures I a awesome book, I got it from the library, so you might check there before buying it, but it is really one that I have put into my fav's. Just keep on studying and fallowing the advice Matt gives and you'll get there. I'm going to put some of my skeletons on my page so if you want you can come check them out and get an Idea of the simple shapes to use. Ttyl.