About downvoting, as far as I can tell Lemmy's default sort order is Hot, so most recent. But I usually switch it to Top, so by points. IMO downvoting to disagree is a complete anti-pattern. Effectively what you're doing is silencing someone as a lazy alternative to expressing your disagreement with them. Literal cancel culture. They knew this 20 years ago, hence Slashdot abandoning downvotes in favor of words like "Interesting", "Funny", "Irrelevant" etc. But that was too complicated for the R-site, so here we are.