This site is currently struggling to handle the amount of new users. I have already upgraded the server, but it will go down regardless if half of Reddit tries to join.
However Lemmy is federated software, meaning you can interact seamlessly with communities on other instances like beehaw.org or lemmy.one. The documentation explains in more detail how this works. Use the instance list to find one where you can register. Then use the Community Browser to find interesting communities. Paste the community url into the search field to follow it.
You can help other Reddit refugees by inviting them to the same Lemmy instance where you joined. This way we can spread the load across many different servers. And users with similar interests will end up together on the same instances. Others on the same instance can also automatically see posts from all the communities that you follow.
Edit: If you moderate a large subreddit, do not link your users directly to lemmy.ml in your announcements. That way the server will only go down sooner.
I hope it's not inappropriate to comment this here, but if anyone's looking for another space to join, I'm in the process of building Krab Borg. It would be lovely to have people to help fill it out and diversify the communities, as well as suggest what the local ones should look like as I have no idea.
I'm trying to balance not reinventing the wheel/duplicating existing communities 100 times but also still supporting the idea of decentralisation and creating some duplicates (though this isn't hard and fast, I'm open to feedback).
I've seeded it with some communities from other servers (including a bunch from lemmy.ml) to get things moving a bit as well.