Ah I see, good to know. I don’t think my country blocks them, but I’ll try to do some research. It seems like TOR has a nice overview over good and bad ISPs too, if one were to go the route of hosting through a company: https://community.torproject.org/relay/community-resources/good-bad-isps/
If you want the answers to the questions you listed, then it’s pretty much covered in the privacy podcast called OptOut. Linked here if u wanted to have a listen.
https://www.buzzsprout.com/1790481/15505787-proton-wallet-w-andy-yen.mp3