For example, I’m a white Jewish guy but I’ve adopted the Japanese practice of keeping dedicated house slippers at the front door.
I adopt representing 3 with thumb, index, and middle finger (German?), Instead of the usual index, middle, ring. This is easier for teaching my little girl as her hands muscle aren’t fully developed yet and have a hard time controlling her ring finger.
It looks oddly asymmetrical, like weight is missing from one side but otherwise it’s good for your hand I suppose.