/ic/ - Artwork/Critique

How do I practice facial expressions to make my work feel more "alive"? Everything I draw right now has the same blank expression

Is there any suggested practice method? I never know where to find good references for these.

>Trying to draw a face as a study
>Eyes look fine but too different from the reference pic
>Know exactly what's wrong with them and how I should fix them
>Every attempt to fix them comes out looking incorrect because I can't get my hands to do what I want
>Progressively get more and more frustrated at my inability to fix the problem, despite me knowing what's wrong with it