Before adding details in Makeup Mania, decide what you want the viewer to notice first. You might focus on the eyes or choose a lip colour as the main accent. This is a suggested design exercise, not a verified scoring formula, and it does not require a named official theme.
A useful Makeup Mania practice plan is to pick a small group of colours and give each colour a purpose. Choose one main shade, one supporting shade, and an accent if you need it. Compare them on the character instead of assuming a palette that looks good elsewhere will produce an identical result.
For your first Makeup Mania attempt, stop after one part of the face and inspect the whole look. Ask whether that detail fits your intention, whether it is clear enough to see, and whether another detail would improve it.