Because you have a more semi realistic style you had a good foundation for the structure actually, I think the issue with your “off” feeling comes from a lack of form clarity. In this specific piece, you’d benefit from pushing your values more (so brighter lights, darker darks), and having a clear light source. But overall if this is a pattern in your work, I’d say improving values and doing form studies (shading spheres and cubes) would help a lot! And I kept the red kind of scheme for the background to keep it dramatic but I think a pure black or white would look great too, just avoid the hair blending in with the background like in the original.

