Note: Judging by the comments, a lot of people are obviously not reading the post and are instead assuming we are calling for defederation of lemmy.world. That is not the case, and in fact the opposite is true. LW already temporarily defederated anarchist.nexus once, and the evidence suggests Mr Kaplan is now pushing for full defederation of all the FAF instances. We are trying to build a coalition of instances that will agree to defederate from lemmy.world IF Kaplan goes ahead with the defederation. Apologies if you weren't aware of the context.
🏴☠️ Hoist the Black Flag: Pledge to Boycott Lemmy World!
... if Lemmy World dares to defederate from any ship in the Fediverse Anarchist Flotilla - https://lemmy.dbzer0.com/, https://anarchist.nexus/, and https://quokk.au/.
Mateys, we can’t let a mega‑instance captain bully the rest of the fleet just because their ship’s bigger. If Lemmy World tries to throw the FAF overboard, we’re calling for a show of solidarity: a fediverse blockade of Lemmy World in response, until the landlubbers see reason (i.e., there is an acceptable change in their leadership and/or this policy).
This is about mutual aid, not mutiny - standing together so no single admin gets to rule the seas unchallenged. A united armada of smaller instances can absolutely blunt Lemmy World’s outsized influence (and, let’s be honest, their ego).

☠️ A word to the captains: before hoisting colours or locking in a course, we ask ye to let your crew have their say. Run a poll, open the deck for discussion, and listen to the voices aboard your vessel. These seas belong to all of us, and decisions that shape our fediverse should be made together, not from the captain’s quarters alone.
If other captains be keen to chart this course with us, drop anchor and make the pledge public in the comments. The more hands on deck, the harder it is to sink any one of us. Let us know if you are holding a vote!
dbzer0 and AN members can vote on this pledge in !div0_governance@lemmy.dbzer0.com, and quokk.au will be holding their own vote.
🏴☠️ Solidarity forever, and fair winds to the Flotilla!

governance type: sense check
Of course, happy to help! You're far from the only person on the Fediverse who isn't entirely sure how the whole thing works, it's kinda confusing stuff to wrap your head around, so please don't sweat it at all, and ask as many questions as it takes <3
Some instances are general-purpose, some instances are specific to a certain locality/country, some (such as my own, pawb.social, which is a specifically furry-friendly instance) are for special interests, and so on. There's no harm in creating a few accounts on a few different instances and just seeing which you prefer the vibes of, or just pick one and roll with it. I'd personally recommend avoiding lemmy.ml and hexbear.net as well, as those are both pro marxist-leninist instances and can be quite intolerant of people who do not agree with their world views, and are widely defederated, so they're a little bit more siloed, but it can be worth having an account there too if you're interested in seeing content from them from time to time.
There are some admins of the Lemmy.world instance who are pro-Zionist/pro-Israel, and who are intolerant of anti-Zionist messaging. The way that they suppress dissent is generally hard to spot unless you yourself engage in anti-Zionist conversations, because it's generally through silently deleting comments and enforcing rules more harshly and in a one-sided way against those who they personally disagree with, and selectively not enforcing rules for those who agree with their views. You'd need to be looking for trends in what kinds of posts/comments are most commonly deleted in the Lemmy.world mod log - when the mod logs are even made public, which sometimes they aren't. So you can't be blamed at all for being unaware of the issue, especially considering that the admin team are quite cagey around the topic.
So, basically, Lemmy and PieFed are both just different interfaces into the same content. It works a little bit like email - you have your own email provider and other people have their own email providers, and everyone can communicate with each other through email, but the different providers have different interfaces and so on. Some providers use the Lemmy interface, and others use the PieFed interface. PieFed has a couple extra features, like polling, but Lemmy has existed for a lot longer, and may be a bit more stable. Basically, just pick whatever, feel free to try them both out and see what you like.
As for why, basically, because someone decided they could do a better version of Lemmy, and decided to just go off and do it, and they made PieFed. There's a bit more of a story behind why they decided to, but it's ultimately not important for users.
Because Lemmy.world has the overwhelming majority of users and communities, they can throw their weight around and bully other, smaller instances, which is basically what is happening in this recent drama. By migrating users (and ideally, communities) off of lemmy.world, they become less capable of doing that, and so they have to act a bit better behaved and play well with other instances for mutual co-operation.
It's up to you whether you delete your account or not - usually active users are used, rather than overall users, to judge the size/activity of an instance.
Yeah, you can do it manually, or you can use the automated tool I linked above - it'll move your saved/favorite posts/comments over as part of that process.
Hope this helps, feel free to ask if there's anything else you need clarified!
Thank you for taking the time, a lot of time, to help me. It's much appreciated and very polite.