I'm not good at hatching and other shading method (like cross hatching, shadow and light area) and value important. Plz teach me hatching and other shading method like manga style. Also tell where i was messed up in two drawing and where should I improve more.

I'm not good at hatching and other shading method (like cross hatching, shadow and light area) and value important. Plz teach me hatching and other shading method like manga style. Also tell where i was messed up in two drawing and where should I improve more. | Artwod Feedback