Today, I started weight painting of "head" and "neck". That is the task of setting the degree of influence of the bone on the mesh. The intensity of the influence goes from blue to red (blue → green → red). Blue has low influence and red is strong. The following images confirms the movement of "eyeball controller", "head", "neck" and "jaw".
Weight painting around the shoulder will be done tomorrow. It is a bit difficult to include the shoulder blades.