7/10
Maybe try shading a bit and try scribbling on the book so it looks like he is actually reading something. Also try shading and lighting the hair a bit to give it some texture. Also add some glow to the candle by using the paint roller
Could use a better background. Maybe put some dots on the guitar to make it realistic. The clothes could be more wrinkly, and shade the gray shirt a little more.
8.5/10