Face/Facial Expressions Advice?

Heyo! I've been doing a lot of figure study sketches but I've been struggling with faces and facial expressions. Mine tend to be kind of mundane and somewhat boring. I try to exaggerate more but it never really ends up looking right. Does anyone have any tips or useful resources to better understand what makes facial expressions so expressive? Thanks for reading!

This mind sound silly, but study some cartons.

I echo the comment above. Find 3 cartoons with different styles that you love and try to recreate that style. Even look at 3 more cartoons that you hate! This will help you find what you like/don't like about how people stylize expressions, and create your own style. Sometimes I'll even get a mirror and make some silly facial expressions myself, and try to draw them.