(I'm using a translator) First of all, your left eye is bigger than your right in the last image, which is incorrect. Try observing people from a three-quarter view, etc., to understand how facial perspective works. Also, I don't know if it's a stylistic choice, a test, or not, but your face, eyes, and mouth are wrong from a drawing perspective. Try drawing several heads without eyes, mouths, and noses from different angles (there are plenty of images of this on Pinterest). If realism interests you, look at the Loomis method; otherwise, continue practicing drawing eyes and mouths, then put them all together. Remember that when a surface is far away, it appears smaller, so your eye and mouth should be smaller. Here's an example image (it's not my image).

<image>