As for stuff in the terminal, if you ever need to use it, you’ll probably be able to find what commands you need online and copy/paste. There are a lot of thing you can do in the terminal, but it isn’t required much. As for installing software, it’s significantly easier and more convenient than in Windows. It works more similar to Android or IPhone, where there’s a shared place to get them from and they will all be updated through that as well, instead of having to launch the application and have it check for updates, download/install them, then relaunch.
https://www.protondb.com/
It looks like world of tanks at least works on Linux fine. I haven’t tried it, but it’s rated as gold.
https://www.protondb.com/search?q=World of tanks
As for stuff in the terminal, if you ever need to use it, you’ll probably be able to find what commands you need online and copy/paste. There are a lot of thing you can do in the terminal, but it isn’t required much. As for installing software, it’s significantly easier and more convenient than in Windows. It works more similar to Android or IPhone, where there’s a shared place to get them from and they will all be updated through that as well, instead of having to launch the application and have it check for updates, download/install them, then relaunch.