I drew these on my sketchbook as a draw-along practice with one of the awesome Chommang's Youtube tutorial videos (link included below). I really like how they turned out so I decided to further polish and digitize them.
Chommang's Tutorial Video on Facial Expressions: https://youtu.be/t69Pdpz3fik?si=tIBIsNKTQ3ULISZh
Chommang's Youtube Channel: https://www.youtube.com/@Chommang
Chommang's Insta: https://www.instagram.com/chommang/