1. When I've ask you "what you use" I mean the official linux installer version from here.
I've verified again to be sure if I've miss something and I don't find any flatpack, appimage or whatever.
2. Like I've said already, until you don't use the official installer and installed as official instructions, I can't help you.
3. You are free to experiment with whatever you want but you will be mostly alone.
Generally I don't get why some users prefer the hard way but this is not my job.