I think the issue is that there's a slow trickle of people who have just gotten in and go "Wow I just got in, has anyone got any tips?"
Find one or more feeds you like and pin them. I use the newly created For You feed (which algorithmically puts stuff there it thinks you will like) and a couple of topical feeds that are specific to my interests. I think it's great. Way more content that I care about than there ever was on twitter, and way way more engagement between folks.
I'm a big proponent of Mastodon/Firefish in general, but while they win in volume, Bluesky is already pulling ahead for me in signal to noise ratio. (I think that's very subjective to what things interest you, so YMMV.)