Good morning to you, Annelle, and welcome aboard, but I'm Polyvios, but how are you?
Say, nice work on your range of expressions, spaces of the face, and facial relationships (proportions and angle). I think your drawings are pretty slicker but rawest but I feel that these expressions still need to be pushed a little bit more, particularly your tilted face, and your shouting expression. How would you like to go ahead on pushing your action of your expressions with 5 minutes of 30 second face drawings, all drawn from your shoulder with a 8b pencil?
As a result, your sketches of expressions will be drawn less stiff, and more lighter, dynamic, and vital. For more info, please look into the Ben Caldwell book, Action! Cartooning in PDF form, here?
Good luck from me and all of us.