I installed Debian + KDE on my mom’s laptop. She hasn’t had a complaint since. How tech-savvy is she, you ask? I’m sitting with her right now, so out of politeness she put on headphones to watch her favorite soap opera. Mind you, the headphones weren’t plugged into the laptop. She was sitting there, headphones on her head, sound coming through the speakers, watching her soaps like this is how it’s meant to be done.
Depends, if you want to play online, tough luck. Most anticheats refuse to work with Linux, the smaller games probably work fine, but if it’s somewhat mainstream (fortnite, valorant, cod, rainbow six, etc) it probably won’t work. ProtonDB has a great list.