Hey, great job!
It does look pretty good, looks like you took a more stylized approach, and to my eyes, it's not really a problem.
There are some differences from the references tho, for instance, realistic eyes tend to be way smaller than we think. When i'm doing those i tend to do huuuge noses, so i always do them smaller than i think is right lol
And do note the distance between the eyes, it really varies from person to person, it's those little "imperfections" that makes people different from one another.
All that said, realistic is not always appealing and the study doesn't need to be a exact copy from the reference, if you learned something from it and liked the result, that's a huge win to my eyes.