I originally chose to make my account on lemmy.world since all the content seemed to come from there. But I’ve since learned that I can fill my feed with stuff from any instance so it feels like it doesn’t actually matter if I’m on lemmy.world or not. At the same time, Lemmy.world seems to be frequently under attack so I’m wondering if I should change instance but have no idea what I should even be looking for when choosing.
I chose an instance ran by the same person who owns the mastodon instance I am on, it’s not that popular compared to the big Lemmy instances.
For my mastodon instance I chose one based off of: being on the official list, region, how many people post on that instance in a day (too many posts = too many users), what kind of stuff they post and the rules I have to follow. You could follow the same idea with Lemmy.
For the most part, I ignore the main instance and just look at my subscription feeds through a 3rd party app. So far, nothing bad has occured from being in a small community.
Also, look for posts on Lemmy or Mastodon about updates for a particular instance. My instance is being updated often and is actively geared against the spam bots and ddoss attacks from the past month.