(I am not an expert on skin. If you want to learn skin care for nymphs, please go read @promiscuous_gurl22 nymphet guide.)
Nymphet makeup is usually about looking as natural as possible. It's about looking young and simple. Nymphs don't try to do anything complicated.
Eyes👀
Eyeshadow- Typically, eyeshadow isn't used. If it is, it's a cream color or close to the skin. It can be illuminating but nothing too bright or outgoing.Eyeliner- Eyeliner can make you look older or more mature so nymphs tend to stay away from it, but it can be used if used correctly.
Mascara- Nymphs sometimes use mascara and when they do, it's usually a brown mascara to look more natural. Not a lot, a little will go a long way.
Eyebrows- eyebrow tint and brushing them out is probably the best. Making them look full and natural is the best way.