first of all i recommend checking out james gurney’s color and light and the youtube channel light ponderings! they’re great free resources (JG’s book is a pdf on internet archive, and for LP look up “a new way to think about beauty”). with my rendering the biggest tip i can give is to organize your selections by individual materials (skin, cloth, hair etc) so that you can just use one color palette at a time. blocking in is a tricky part but squinting as well as zooming in/out often help to make sure that the overall composition is working!