Im not sure if it would delete the whole system. Isn't it more likely that it will destroy everything until it kills a file/directory necessary for the operation to run?
Bro, if you don't know about the politics of a certain country, it's better to shut up about it. Björn Höcke, who's considered to be the middle of the AfD wrote in his book "Nie zweimal in den gleichen Fluss" that "we will loose certain parts of our population". To achieve this he's willing to use "well temperarated force". There are hundreds of quotes like this. Many of the regional AfD fractions are being observed by our protection of the constitution or even assured right wing extremists which means they are literal Nazis. The AfD say that the only difference between them and the NPD, they tried to ban, for them being nazis, but failed because it's to small, is that they are more popular. It's not about conservative. It's about this whole fucking party being full of Nazis.
For the beginning you can also dual boot. For games it depends. A lot of stuff works right out of the box but a lot of stuff requires additional steps or doesn't work. You can also check if a game is playable on Linux on protondb.com
Im not sure if it would delete the whole system. Isn't it more likely that it will destroy everything until it kills a file/directory necessary for the operation to run?