Life is a long learning experience. Installing (or asking that nerdy relative to install) a Linux distro is no biggie anymore and when picking a good all-around distro like Mint, for example, pretty much anyone who has some basic experience on computers can do it.
I get it. That’s why I included the part about “the family tech guy”. And I think some sparkle of interest must be had in order to learn about that stuff. Or any stuff, like learning Ancient Greek. One has to be able to use a web search (or write a prompt to an LLM) for “beginner install linux” or some such. If the spark isn’t there, maybe buying a new Windows/Mac is the correct way to go.