Super Mario World is my answer to “If someone who never played a video game before asks you to introduce them to gaming, what will you start with?”
Possibly becasue it’s a major entry point for me into gaming, but it’s also colorful, specifically designed to be beginner and child friendly, it’s whimsical, the controls aren’t that complicated (though there is a deep end to that pool) and being a 2D platformer it’s maybe not nausea inducing to people not used to 3D graphics.
A New Hope is pretty good.