You download an ISO, put it on a USB key or burn it to a CD, and install it like you would Windows10 or any other OS.If only it was that easy all the time.
I have an old laptop (2017) that I wasn't for anything else, using so I tried putting Linux on it. Nope. I went through five distributions before I found one that would finally work. And then, it was not really useable.
The whole reason people use MacOS is because they know what to expect. Linux is still a crapshoot.
