Be warned that Lemmy.World has defederated from hexbear.net and lemmygrad.ml but not all other instances have done so. These are known troll instances that, like the Alt-Right movement, offer an extreme and distorted view of their beliefs, but in this case are arguably worse bc they claim to be leftists so you may be more susceptible to falling into responding there, at which point you'll quickly discover why they are considered troll instances. Also, the instance block feature is misnamed and does not block actual instances, only communities located on them. When a mod tells you that they want to shoot and kill you and that they hope you die soon (sadly I am nowhere close to joking, that's a real event that actually happened, although actually that one was the tankie instance lemmy.ml in a small gaming community), you'll see the truth of it for yourself.

So pick a good instance that matches best what you want to see. lemm.ee if you want to see everything, lemmy.cafe or dubvee.org or quokk.au or PieFed if you don't, and so many in-between. https://lemmy.fediverse.observer/list sorted by Active Monthly Users is a great website for that - e.g. perhaps you'll pick a region-specific one like Lemmy.ca for Canada or feddit.org for German + English language, or Discuss.Online or Lemmy.Today or midwest.social for USA, etc.

Alternately, I just block the !politics@lemmy.world and !news@lemmy.world communities and use others like !globalnews@lemmy.zip. But even so, it's good to spread around the Fediverse to take better advantage of decentralization.

Enjoy!:-)