Once you have your structure, you need to "render" it. Proko’s free lessons on are legendary for their clarity. He breaks down light into specific zones: Highlight & Midtone: Where the light hits directly. Core Shadow: The darkest part of the shadow on the object.

The Proko Drawing Basics Free resource includes:

The course provides a structured introduction to foundational art concepts, focusing on the "periodic table of elements" for artists: Shape, Value, Color, and Edge