I have been using Lemmy for 20 days, at first I opened an account at Lemmy.world because you can join without writing a text and waiting approval. I have been enjoying the experience overall but despite the admin teans best efforts Lemmy.world has been experiencing some serious performance issues. If you want to avoid that join a smaller instance, preferably hosted in your country. I joined discuss.tchncs.de today and everything is so much faster it has added benefit of being able to see beehaw.org posts too. It will improve not only your but all other Lemmy.world users experience too.
Won’t you see limited posts?
As far as I know, once instance and either see all its own communities and all other instance’s. So should be fine and you wouldn’t be causing load on instances used by people who dont have enough knowledge to host.
Not if they’re federated to the larger instances, which they are by default. I think maybe you need to search an instance to start if no one from your instance has searched for the other instance yet, but idk, don’t quote me on that