This lesson would be helped with a clearer reference photo--one where the hair is discernible across the entire drawing as opposed to using a photo with a model with dark hair against a dark background in which most of the back of the head is lost.

Drawing the clothed figure.

There's a lot of energy and creativity in these pages and the art style is fun and distinctive. I would echo what Julien stated about clarity, however. Spaces between panels give the reader room to breathe and help clarify the separate actions represented in the panels. When panels are combined or overlap as a number of these do, it causes separate panels to join together in a way that can stand in the way of the story. The panel and space set up sets up the pace of the story on the page. For example, the closeness of panels to each other and interaction between series of short panels in this example make the pace very fast. And since most of the panels appear to be about the same size, those moments that are important for the reader to notice might get lost. Obviously, such comments are made not knowing the original intent. As a stylistic choice, if you are blending panels, etc., to create a fast, chaotic pace, then that's something that would have to be factored in as well.

Drawing basic forms is not as intuitive as it might seem at first glance. It looks simple, but there is a lot of nuance to it. A lot of art books and courses don't pay enough attention to really nailing down how to do boxes and cylinders correctly, and if you move forward without a solid understanding of those things, it will plague your drawings. I was thinking about posting some threads to help with this very thing. Let me know if you're interested.