I want short hair but i look like Dora

i want to cut my hair short but the last time i chopped it off just above my shoulders, I looked like white Dora lmao. My hair is thick and wavy and just acts out on its own. It's so thick that even when its short and i use a hair straightener, it looks blocky bc of how thick and how much hair there is. I want the look of someone with like few layers of hair, not stacked on stacked on layers of hair like mine. Im thinking of doing like a triangle undercut to lessen the amount of hair to see if it'll change anything.

Does anyone get what I mean? Anyone have suggestions on what I should do?