Diagram:
This face is folded in accordance with Teach Yourself Origami by John Montroll. Pages 38/39.

My Experience:
The most difficult part of this was the rabbit-ear folds. The initial folds are the fish base.

This is folded inwards to start so it’s entirely of the non-white side color.

In any case, this isn’t super complex but is very satisfying when finished.

Personalize:
As changes to this, you could tilt the hair differently, or more intricately.

Also the eyes are rabbit-ear folds followed up with squash folds and then tucking under. Easily modified to make squinted eyes or more rounded.

The nose would be the easiest way to make this your own. Folding it down or out. Also, accordion folding it up more to add wrinkles would be a nice change up.