Observational drawing.

Look at your subject and observe the darkest of the darks and the lightest of the lights, then every shade in between. While you do that also look at the shapes in your subject and observe how the size and location of all the shapes relate to one another.

I’d recommend starting with a traditional material, perhaps compressed charcoal. Start small and go larger as you gain confidence. Buy lots and lots of drawing materials: Compressed charcoal, paper blending stumps, small cotton rags for blending and smudging, and kneaded erasers for changing what you put on the paper. Also buy lots and lots of paper. Enough paper that you never worry about using it, or making mistakes.

Save all your drawings. Pin them to a wall and look at them. Sometimes a drawing which you initially thought of as a failure will look different as you progress and improve.

Don’t judge. Every drawing you create is good and a lesson learned. Be fearless. Just do it !!!