Most daily sketches are boring (a cube, a sphere). Grünewald’s are mini-stories. A girl hiding from rain. A monster under the bed. Every sketch has a "before" and "after."
A: Simone suggests 15 minutes minimum. 1 hour maximum. The goal is to build the habit, not to burn out.
The book Sketch Every Day: 100+ Simple Drawing Exercises from Simone Grünewald