Good work!
Male came out nice; you don't have lighter values here and his beard is lost (but you probably focused more on face)
For hard edges you can learn planes of the face with asaro head it also helps with shading.
You can try picking colors in some areas (surfaces in light, in dark, cheeks etc.), paint these swatches next to each other and observe how they behave with color picker. For example cheeks and nose will appear more reddish