What you’ll need
Creating lighter/darker colors is: layering and pressure applied. This technq.is great for beginners
Also called scumbling. Creating squiggly almost circular lines& adding more layers for darker colors
Kneaded erasers are better for erasing lightly/erasing smaller spaces. You can manipulate it however
Stiff erasers are better for creating harsher eraser lines, and creating a cleaner look.
See: creating harsh lines with a kneaded eraser vs. a stiff eraser
Using white charcoal to create lighter shades can create a grey color when mixed. Keep hands clean!
Note: you can also shade with tissues, instead of your hands! Be careful because the tissue will rip
It’s harder to see white charcoal pencils. You have to use much more, & it doesn’t mix gray the same
You can see here how much harder it is to see white charcoal pencil.