there is a guide for playing league of legends on linux, you can find it here: https://leagueoflinux.org/install/, also, riot is conscious that there are people playing on wine, due to that their anticheat doesnt detect wine players as hackers: https://leagueoflinux.org/faq/, and about my desktop, here is the config: https://lemmy.world/post/6869753

maybe, but if you want to stick with windows, there are some tools that allow to create cool widgets, modify the taskbar, etc. Some examples are: winaero tweaker and rainmeter (those tools can affect windows stability and performance, and in the case of the most extreme ones, it can directly destroy your installation)

i dont think that you will be banned, although i think you could tune up your desktop a bit more