You need to decide on your primary focus (what do you want us to look at?)
At the moment you're somewhere in between the window/wall and the figure.
If you drop this to value - things aren't clear enough.
You need to be (IMO) a bit more extreme, light over dark, or dark over light are a pretty simple base techniques - you can vary this to fit the mood you are after.
Be careful with your background elements - the wing behind the head and the 'smoke'? are interfering with the read of the figure.
Quick scribble for you that isn't 100% right, but hopefully you can see what I'm getting at:

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