Also tried getting into it. I put ~10 hours in but I just played less and less every day until I stopped entirely. One thing I never really got used to was the camera controls for example.
But I also played alone, so I think this game is more fun with friends.
I always synced my database manually either directly over usb, or wifi (KDE Connect). I have to admit that it’s not really user friendly, but once I got used to it, it’s no problem at all.
And uploading it to any cloud service should be fine as long as it’s encrypted with a strong password. But that kind of defeats the point of an offline password-manager in my opinion.