Well....I have to be honest about this piece. I can't say this fits the song piece, but I'll list the god, and the not-so-good. The good, is that I like the particles in the piece, I think the cliff/rock are the best looking things in this piece, as well as some of the shadowy background. The not so good, there is more improvement to be made to the man.
I suggest studying human anatomy more and watching tutorials, that helps. It seems disproportional. The waterfall in the background (if thats what it is) is also not so good with the detail, it looks like squiggly lines. However, I like the wooden post he's tied to as well, that looks good. This has potential, just seems unbalanced as if two artists made this.
Good effort, keep it up, I know you'll improve in time, I like some of this piece. 4/10