you’re on lemmy.world which is now the biggest instance and therefore is getting hit the hardest with the reddit exodos. You can either wait it out for lemmy.world to scale their server, or you can try a smaller instance with less load on it. In any case you can still reach the same fediverse regardless which one you choose (with some exception as some instance are blocked or deferated, for example lemmygrad.ml is defederated from a lot of instances due their political POV).