Hey there! Nice job here Well I'd focus on structure and gesture. By structure, I mean that you keep in mind the volume/form of the body parts, like the head. The eye sockets of the mask do not follow the form of the face, and they look flat By gesture, I'd focus more on how the body moves. If the shoulders are slumped, the chest follows that movement, so it shouldn't be completely straight, as if you were drawing a neutral pose. Since you already have a solid construction of your figure drawing, I'd say that you should study the muscles a bit more, especially the way they overlap with each other. There's no need to be a master of anatomy, unless you want to illustrate the comic style, but at least to have a better grasp of it. For example, the way you drew the muscles of the left leg are quite odd. Hope this helps!
