Hellostoryteller - Laura Froese - Mastering Skin Tones

https://www.hellostoryteller.com/laura-froese-cart/mastering-skin-tones-mini-course

In this course you'll learn
There are probably few things photographers spend more time obsessing over when editing than skin tones. Are they too cool, too warm, too green? How do I know if these are even “right?!”
This mini course was designed to answer those exact questions. It contains the “math” behind nice clean tones (yes, there are actual numbers that can help you - it’s not all just blind guessing!), as well as activities to help you learn to train your eye.