Wow Wilme! Beautiful!    I have some advice that might help:   Structure: 1. A few things end up in slightly the wrong place. At the hairline there is this bundle (marked blue). It should be closer to the centerline than what it is in your drawing. Maybe you forgot to construct using a centerline?. The eye and brow are also a little too far from the centerline.  2. The forehead could need some more construction. Before you start shading make sure you have a full understanding of the planes (marked red) This will make your drawings more three dimensional. The same could be said for parts of the nose and eyes (blue arrows). Adding a top plane to the lower lid reveals it´s thickness and dimensionality. Adding a bottom plane for the nostril does the same   If you haven´t already I recommend watching these two videos. LOOMIS HEAD https://prokolab.com/course-lesson/how-to-draw-the-head-from-any-angle/discussions PLANES https://prokolab.com/lesson/painting-the-head-from-imagination-lighting-without-reference-with-marco-bucci/discussions   Shading: I think your rendering is beautiful, but it could be stronger if there was a clearer value difference between light and shadow. It will help the brain read the dimensionality better. Make sure that your darkest light is lighter than your lightest dark. Hope this helps!