Your lighting direction doesn’t make sense. Look at the direction of your cast shadows–they don’t even line up properly with your main light source, which is that open doorway. You need to study the very basics of lighting, as all lighting must be logical and based on the laws of physics. (EDIT: Ignore this paragraph–it’s incorrect and written when I was about to go to sleep.)
It also doesn’t make sense the cast shadows from the walls are so faint and diffused, while the cast shadows for the figure/chair are so dark and hard-edged. Your lighting and shadows must make sense and have logic behind them–you cannot be arbitrary about this stuff. You have to learn this if you want your work to have any credibility.
The figure and chair are still way too bright on the form shadow side. It is impossible for them to be that bright because if there’s a secondary light source or strong ambient light, then we would see the cast shadows being filled in more, and the walls would be a lot brighter than they are now.
I strongly suggest you focus on studying the basics of visual art–lighting, values, composition, color theory, anatomy/figure, perspective, etc. Make that your number one priority in your artistic development, and you’ll improve much faster than you are now.