I've been experimenting with using a Raspberry Pi 3B+ (less than $40) as a computer. I'm thinking of trying Raspberry Pi Zero W (about $10, $14 if you get it with GPIO pins already soldered in) for some high-risk online reading. The 3B+ and I believe the newer, slightly more expensive 4 series of Raspberry Pi computers can be run with the operating system on a cheap USB drive, the Pi Zero W has it on an SD card. There is no hard disc.
One of the things I liked about the first computers I had was that the operating system was stored on floppy discs - there weren't hard drives, yet - and you could always have a clean back-up disc in case the one you used was corrupted or infected. I missed that as operating systems got bigger and were stored on the hard disc.
I'd never consider clicking on something like a Tom Metzger website or others I'd suspect of infecting my computer's hard drive, so I can't directly research such poison. I have done that in the past and in several cases I know they infected my computer, sometimes I couldn't find the virus and the anti-malware programs didn't seem to clean all of them out. I suspect that someone has phished one of my older computers when I clicked on links, I know in one case they seemed to get the name of the guy who owned the computer before I did - nothing like something like that happening to you to stimulate your online paranoia.
Don't think I'll ever buy another PC, as such, since Raspberry Pi and other single-board computers can do so much more than I expected, are so easy to set up and maintain and switch out components on. I did have to buy a small TV to use as a screen - I felt dirty buying it - but other than that it cost me less than a hundred dollars to do it. Most of the parts I had to buy (cords, adapters) won't likely ever break or go bad so I might never have to spend more than $40 or so to buy a new computer.
A few Youtubes might give you some idea, I had to look up some of the terminology to get some of it. It's not complicated. It's so simple even I could do it.
There are plenty of websites to give you other ideas, some that have print out instructions.
Even more reason to be glad I switched to Linux. I have yet to regret anything about that.