Damn wow this looks great :O

i am impressed, can you do more ?
i think you got great tallent in capturing the face expressions! but there is one thing i would like you to tell about the shadow details, its great that you did all the shadows but next time choose on light origin.

here a little tutorial about light.
https://design.tutsplus.com/articles/improve-your-artwork-by-learning-to-see-light-and-shadow--cms-20282

i hope you will continue drawing because i think you got

great talent !

greedings from germany