Check out my website paintwithlovejoy.com the paint your pet course will help you learn about the value scale. I will be making more intermediate courses next year. On RU-vid I have a few adv. Beginner watercolors and a few for Georgia okeffee paintings..... i do focus more on the Firsttime and Beginner painters. I also entourage learning from a variety of teachers, to strengthen your knowledge. The art Shera, painting with Jane, Angela Anderson, & ginger cook all have wonderful tutorials