https://www.cgmasteracademy.com/courses/89-head-drawing-and-construction/

An 8-week course deconstructing and constructing the human head; students will become familiar with the shapes and form and will learn to draw the head with knowledge of anatomy

This course builds on the skills and information covered in the initial Analytical Figure Drawing course, as well as challenges students to push those skills through the introduction of additional subject matter of the human head. Students will be introduced to basic structures of the human head, underlying muscle groups and how they affect different forms of expression, structuring of different types of hair masses and rendering and at the end, creating a final well-constructed and fully rendered face.

The more you know, the better.