I left Lemmy to come here to join the fed not too long ago. I went through the setup and joined a bunch of communities. The most active one I spend reading is Selfhosted. Besides that I’m on my home page using the default “hot” and “subscribe” sorts enabled and I see the same thing all day every other day. I see people say it’s not that active and I know this isn’t Reddit with its volume but it can’t be that inactive here. I’ve tried “hot/new” and “all” just it seems to be a bunch of RSS feeds with no human context or interaction. With I’m doing something wrong or the communities I’ve joined aren’t active enough or both.
Your absolute best bet is to sort All/New, build a filter list of users, communities and instances that you don’t want to see content from and enjoy and active feed of content that interests you. This would never work on a site like reddit but due to the niche nature of the fediverse, it’s the best way to keep from feeling like you’re the only one here.