I’ve learned a lot about privacy/security from xmpp chatrooms, especially the room for the conversations client and the divestos chatroom. They both are kind of support chatrooms for the chat client/ android rom but privacy is often a topic and the programmers/ rom maintainers are also present and very knowledgeable. https://search.jabber.network/rooms/1
I’d say it’s best to only buy routing devices supporting openwrt. Some Ubiquity devices seem compatible, so maybe you are in luck. In my opinion it’s just best to stay away from preinstalled commercial software and just install Linux. You get away from the whole process of enshitification, gain long term support and an incredible set of features commercial software will never provide (at a reasonable price) imho.
Gaslight Anthem
Satanic Surfers
Millencolin
Lawrence Arms
Luther
I would switch to jmp immediately if only it were available in Germany.