Persistence, willingness to learn or open curiosity, and responsibility.

Persistence because sometimes when learning things, you'll run into problems and will need persistence yo overcome them.

Willingness to learn or open curiosity because otherwise you're in a rut and inflexible which makes learning differences between Win/Mac and Linux almost impossible or at least much harder.

Responsibility because you are in charge of your system and your laptop/pc. You need to take responsibility for learning how to do things, solving problems, doing updates, etc.

Sadly, these days people lack most of these qualities. So many people want things handed to them on a silver platter or to have their hands held and told exactly how yo do something instead of working it out for themselves. And people don't want responsibility - they want someone else to be responsible, someone else to blame and someone else to do the thinking.

A lot of Linux adoption won't change until there's also a culture shift :/