A. I'm looking at pointer speed section in Mouse Preference in Control Center. It's pretty simple. It give acceleration and sensitivy.
B. Just about every GUI aims for decent defaults and doesn't allow endless customization and such customization generally isn't a beginner task.
I've used the Linux desktop for ten years (Mint then Ubuntu-Mate). Haven't customized anything with a bash script for many years. It is currently clearer how to do things than Windows - it's fricken TWO start menus jumping over each other.