Is sway something for my wife/gf?

I do not think so..
Sway is more for developers/nerds and ppl who love to do most things with the keyboard. It is very very efficient for working like that.
My wife is not a casual computer user, but I think she loves handling windows and stuff with the mouse more.
So I still have to provide her a gnome on our desktop computer.
Linux is no problem for her. When we started living together I gave her a choice. She can keep her windows on the computer, but I will not repair it when something goes wrong. Anyways i do not use windows@home for so many years I practically could not even repair it.
So she decided to use linux from then on. She is using linux now for > 15 years and is happy with it.
Now you for sure think: "yes if you only do some web browsing and so on, linux is not a problem"
But it is not like that, she is a primary school teacher, so she does a lot, really a lot of office stuff. Libreoffice improved that much in the last 20 years that it is really a good tool for her.