My advice: reply to 7-21 day old posts! Go to !chat, !askbeehaw and speak your mind! !chat needs more posts too! OPs there still tend to respond to those posts.
Lemmy is first and foremost a link aggregator you know. So it’s not surprising there are a lot of news links. I think each community is different in terms of the percentage breakdown between news, discussion and meta-discussion.
I don’t have a clear idea of what you’d want out of Lemmy, but I’m open to hearing it for ideas to make an effort to make Beehaw a livelier place that I could try contributing to myself.