You can use https://launcher.moe/ 's software for Hoyo games btw. The top one is the one for Genshin Impact.
Though last I installed Genshin on Linux I remember there being a slight chance of getting banned because you had to disable the anticheat to run it on Linux, but I never had it happen to me and I’m not sure if that’s still valid.
LibreWolf doesn’t work to give you a non-unique fingerprint. Use Mullvad Browser for that (without changing anything other than the safety level).
Don’t use a VPN with Tails. You could try something like https://github.com/PJ-Singh-001/Cubic to roll your own custom Ubuntu ISO, or you can just install another Linux distro on it which is what I recommend. Don’t forget to enable disk encryption because you can’t reliably wipe data from flash storage.