I am studying the course "Concept Art: introduction to the design of scenarios" taught by Jean Fraisse in Domestika.

I recommend it a lot, it's very well structured and synthesized, besides Jean is very pleasant and gives very useful techniques.

I show you an exercise that I finished, consists of creating a scene with no more than 4 tones, including black and white, playing with the lasso tool to draw silhouettes, it doesn't have to be detailed but everything has a purpose (direction of the eye, points of interest, depth...)

Are you doing an interesting course?