Hey, FH2 itself runs fine on linux + wine, I'm doing that myself.
Retrieving accounts does not work, because this is not the original account server behind the scenes, but a replacement server from the community. You need to create a new account -- need a name that has not been taken yet, but email does not matter.
BTW this is the subforum for the very old FH0.7, which not many people read anymore. Most of us are on discord, there you can get help much quicker