This is just beautiful even just in gray tones. You will have an easy time adding the flesh tones as your skill in handling the grays is impeccable. Can’t wait to see the next one!
The addition of color is just wonderful. The grays underneath have tempered the flesh tones so they appear very natural. My only suggestion is to add blush tones on the cheeks in a very subtle way to suggest youth and vibrancy. Good job again.