nerdculture.de is one of the many independent Mastodon servers you can use to participate in the fediverse.
Be excellent to each other, live humanism, no nazis, no hate speech. Not only for nerds, but the domain is somewhat cool. ;)
No bots in general. Languages: DE, EN, FR, NL, ES, IT
@me look for RISC-V boards, there's a bunch of new ones. They're cheap because of no royalty fees. Some can run Linux. I bought a couple, but didn't yet have the time to work on them.