“Just install Linux on it” is the “just change the engine of your car” of tech.
Not everyone is a mechanic, not everyone wants to be a mechanic, and, if we want a world where freedom is the norm, we must stop expecting everyone to become a mechanic.
Note: this is not because these people are too dumb to be mechanics. It’s because they’re brain surgeons and space-shuttle pilots and they have three kids and they care for a loved one and they don’t have time to also be a mechanic.
We are not going to compete with the mainstream car industry by promoting engine replacements. We are going to compete with the mainstream car industry by building better cars that are safer and more sustainable. But those cars aren’t going to grow on trees. We must fund the organisations that will create them from the commons for the common good.
If you want to install a distro, there are many ones, and everybody has their favorite. Mine is debian, but there are a few pages to read (https://www.debian.org/releases/stable/amd64/)
This one has less pages to read and many users too. I started with this one. https://www.ubuntu.com/download/desktop
This is my personal Mastodon.