What a curious mixture of perspectives. The floor is top-down, the bed is not-quite-top-down, the bureau is 3/4, and the wall is side-on.


If you want to draw realistic scenes, I think you need to practice your basic artistic fundamentals. Pick up an art book at the library. Failing that, research on the web the theory behind 1- and 2-point perspectives as a starting point. Remember that pixel art is an extra layer of specific techniques on top of general artistic fundamentals. It's not something to learn instead of them.

Actually, proper perspective drawing is pretty advanced stuff. I'd suggest starting by drawing and shading some basic 3D shapes, or objects that are essentially basic 3D shapes. Draw a coffee mug, a toaster, a beachball, an apple. I know it's not very glamorous, but you'll really learn a lot, and the satisfaction of making a realistic-looking 3D object is quite pleasing.