Look at the chess king at the top of this page. It looks like something only a "real artist" could paint. Now look closer. The body is a cylinder. The crown is a smaller cylinder. The head is a sphere sitting on top. That's the whole trick.
Michelle teaches it openly in the course: the sphere hides inside a multitude of everyday objects. A candle is a cylinder. A plate is an ellipse. Once you can paint the three shapes with their light and shadow, "realistic" stops being magic and becomes assembly.
And she makes the shapes fun to learn: the ellipse becomes a sprinkled donut, the sphere becomes a glowing orange, the cylinders become a birthday cake with a candle. Real paintings, not homework.
You've been drawing these three shapes since kindergarten. Nobody ever showed you what they add up to.