Using several steps I created and refined this sketch, based on a wooden toy duck from Sketchfab. It isn’t a copy, but a recreation based on observation. I can see its flaws, and, therefore, I need to practice drawing solid basic sketches before trying this method on drawing portraits.

A sketch depicts a duck-shaped toy with wheels, drawn in a blue outline on a white background, with a color palette and the word SKETCH at the bottom.