I feel like the values of the character and background are way too similar making the character not as readable. Be careful making object behind the main focal point (which is the character) too saturated and contrasty in comparison to the focal point. You want to lead the eyes to the focal point and your eyes are usually drawn to high contrast and saturation.
I would probably desaturate and lighten up the background to reduce the contrast there as well as really use the light coming from his lantern to lighten him up more with that warm light creating some nice color variation to separate him even more. Also use lots and lots of reference both for the environment and character + try to use a perspective grid to help yourself with the perspective as well.
Keep at it man! 
Hope that help.
