How to control finger's using animation rigging.

I was wondering if there’s any tutorial on how to make hand squish or make fingers pick certain position. most videos just use base animation from the character to “hold” items but I want to be able to put characters fingers at certain positions like for example holding the trigger or holding specific way.

I was wondering the same. You could always set up 10 of the 2 bone IK constraints, one for each finger. It’s tedious to make animations this way though. You could set up a meta constraint that controls each of the source points for all the fingers, one of these on each hand, maybe a multi parent would work. Would be nice if there was something easier already set up. At least you only have to do it once.