The colors look really nice and I like the style but there are some big issues when it comes to proportions and such.
I hope you don't mind but I had to redline your drawing so you can see the differences between head shapes, proportions, etc better.
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Besides the issues with the proportions, the glasses usually don't look like that from a profile view and they look more like this:
View attachment 1303049
(If you purposefully draw the glasses like that I kinda understand why, you can't really see the eyes because of them and it's not really noticeable unless you pay attention.)