What medium do you use?
I have a few books I can send you that teach you how to draw faces, figures, and hands accurately if you want them. Maybe get you started in a nice path
When using canvas I use oil pastels, charcoals, and paints. I'm my best with paints, however.... I sketch well too. I've had little to no classes on how to draw :/
On my kindle, on that particular program, I only use a paint brush of 1.125mm and another brush of 3.5mm in radius. The opacity I use with the brushes varies depending on the effect I'm trying to convey. On special occasions, I'll use ther features, but only on those occasions