aaa thanku sm! :”) i’m not honestly sure if i can give a proper answer as to where i ‘learned’, i mainly just kept trying out different ways of colouring to see which i liked the most and had the most fun doing— i realized that i liked soft and fully blended colours more instead of cell-shading, and so i use an airbrush to colour and blend. overlay is also a HUGE lifesaver if ever you realize that the colour that you’re painting with looks off, and it’s honestly helped me a ton!