Maybe I misunderstood what you meant with "as it gets"? I thought it basically means it"can't be more left because it's already maximum left" and I didn't see how that's supported by your experience.
That implies US politics would be more left than German politics? Neither German nor US politics are "as left as it gets", so I'm not sure they are a great measure here.
It's a general purpose instance. Gargron may be left leaning, but I don't think he's into radical left politics?
There are instances with leftist statements in their about section, openly leftist teams and largely lefty/political local timelines.
todon.eu and todon.nl as well as kolektiva.social are large, anarchist leaning, instances. There's plenty smaller ones but those are good starting points.
Setting up and maintaining the services is one thing. But as soon as you get actual users and want to offer them a good experience, there's a lot of additional work: writing guides, answering support mails, announce maintenance downtimes before they happen, etc etc. You can start with an old computer in your basement, but maybe the Internet connection is too bad? Are you aware of and equipped against legal risks etc?
There's more groups like disroot and I think some are looking for volunteers, maybe help them out to see how stuff works before starting over?
Here's some of the top of my head (all in or around Germany to my knowledge):
That's just how the fediverse works. Your instance only know accounts from other instances by boosting or directly searching for them. Not seeing most accounts from newly federated instances is by design.
You might want a nice overview dashboard of your docker services but the tool shouldn't be able to interfere. I think homepage (the tool) was mentioned as an example since they have a docker integration that only needs reading access
Idk about nostr, but yes, the decentralized nature of the fediverse makes this very hard/impossible. Who has the authority on what's your login? What if I don't want a user to login on my instance because they're a known spammer? Etc
The mini PC case is open and the cables go directly from the mainboard/PSU to the BOD back (4 SATA and 1 MOLEX).