Industry groups argued that those museums didn’t have “appropriate safeguards” to prevent users from distributing the games once they had them in hand.
So libraries are also illegal? Books, DVDs, VHS, CDS, etc. You can replace games with any of those.
I think you have gotten a lot of good answers so my 2 cents are. Install something simple like Ubuntu and try it out. Getting the answers to your questions will not give you the “feel” of using a linux system. Once you start you will begin to have more answers and a lot more questions, specifically in the areas you are interested in.
Also check the Arch wiki, it is really good for any distro because it gives a good reference for configurations.