Nice project, Phoenix!
Is she a resin kit or styrene? What scale or size?
I think I have a Lynn figure from Max Factory in the stash, a 1/20 styrene kit. She's in the silk dress as in your one illustration.
I'll second Gamera's advice, there are YouTube tutorials, but also, you can look at a lot of illustrations. Painting an anime figure is a specialty style within the broader hobby of painting figures. Most of the techniques are the same, as far as shading and highlights go, but particularly painting the eyes is almost unique to anime style. And just paint, and see what works for you.
There's a really good modeler and painter, Cody Kwok, whose website is https://codyscoop.com/ You might enjoy having a look at his work for ideas and inspiration. He paints a lot of anime and manga characters, and his work is outstanding.
I look forward to seeing your progress on this one!
Best regards,
Brad