Color is emotional. The ultimate course moves beyond "blue and yellow make green" into harmonic relationships.
The difference between an amateur painting and a professional portfolio is the "final 10%." The amateur stops when the subject is painted. The professional continues into the Polish Phase.
Technical skill means nothing without a narrative. You learn how to "lead the eye."
Beginners often try to paint details too early. A strong foundation course teaches the Iterative Process:
The Goal of Phase 1: Comfort. You should be able to get an idea out of your head and onto the canvas without fighting the software.
This is where "beginner" ends and "advanced" begins. A beginner paints a "red ball." An advanced artist paints "polished crimson apple with a wax bloom."