If OP is actually looking for allies I can't help but imagine the comedy drama of some guy getting tricked by a Chinese Psyop into going places and doing things because he thinks he's a part of some sort of grass roots resistance lol.
"So when are we going to meet up?"
"It's not safe right now, did you get my package?"
"Yeah, the one with the mandarin on the side?"
"Ignore that, it's shipped from my brother in San Francisco."
Lemmy.world is currently the most popular large instance, Lemmy.today is another one. There are A LOT of instances to pick from if you'd rather connect to one closer to your region or attuned to your personal tastes, and they can all access posts from other instances so if you think an instance is run by people you can trust then feel free to make an account there.
To add onto Pug Jesus' explanation, each instance is a self-hosted server separate from all the others. That means they can potentially be removed or re-added to the fediverse at any moment, they all follow their own rules so the only fediverse-wide restrictions are that the instance isn't so insufferable that every other instance blocks them or defederates from them.
TBH brands probably have more power in creating memes than regular people do. A lot of memes were probably started by brands, such as the spongebob textbook math about footlongs infinitely approaching free as you buy more.
It's the cultural equivalent to breaking into a museum to steal a recalled glow in the dark YoYo!™ and attempt to sell it to an ipad baby.
It's not sane behavior.