Just don't ask how long it took to get my dGPU working properly :D But thankfully, there were a bunch of helpful folks with tips!
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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It suggested 200GiBs for root, which seemed a bit excessive but I didn't argue
If you intent to run virtual machines with virt-manager (especially if you keep the default path), that 200 Gb will seems short a bit :-)
With most PC things (RAM, disk space, CPU, etc etc), too much is better than too little, provided you have the resources.