For sure, duplicate posts are annoying but that’s the nature of the fediverse, I think some apps are trying to combat this but it would take time. Overall I’m pretty happy with my new home here!
I used to get most of my news from Reddit, now that I don’t use Reddit I get them from here. I post pretty frequently news articles on my country’s community and think that they are a good source for a discussion.
lemmyloves.art was just created and there’s also literature.cafe, but there definitely should be more focused instances being created, instead of general-purpose ones.