You can learn important lessons from the most diverse places. I have a book on typography that is amazing, because of the passion and insight of the author-designer. I try to find and read great books, and while the process of finding them is often difficult, sometimes you come across true treasures.
"Drawn To Life vol1" by Walt Stanchfield is a great book.
I was looking for a book on drawing because I want to learn how to draw storyboards, a useful if secondary skill when becoming a director.
Walt spent decades at Disney, animating and giving master classes. I rather wish I was good enough at something that I could give a master class on the subject, but anyway. Really I am not in his target market, they already know how to draw, they just need focus and refinement. I have some clue, given that I took a drafting class in high school, but these are to people who drew all the time and well enough to become animators at Disney.
He talks about how animation is often about caricature, stretching and squashing things to their limits, drawing actions, animating verbs and not nouns. It goes back to show vs tell, but he puts some nuance on the subject.
I think as a writer I have done that with my characters as well, but in different ways. Not in shape but emotion. For myself I often get caught up in the emotion of what I write (which has certain downsides) but I try to feel it as strongly as I can so I can have the character express it as powerfully as I can.
Sure I can write "He was sad."
But you don't feel it. However, if I write something more like, "He took a short sharp breathe. He shut his eyes and tried to suck the wetness on his eyeballs back inside. He dared not think. He picked up the pen and began to unscrew it. It took moments but he soon field stripped it and then reassembled it, counting each simple so as not to think, or remember how much it hurt to hear the barking of a dog and it was not Charlie, and never would be again."
While we can relate to sad, we can relate more deeply to the feelings and actions of a character.
I read so I can take a few hours to learn lessons it took others decades to learn.