Well idk about engagement. I typically post too fast to really respond to everything and I don't really care about upcummies anymore I stopped caring after I left Facebook like 6 years ago. I rather talk about guns or mechanic things but nobody does that on here. The few people that do are dwarfed by the exponential number of laincels who think they are cyberpunk because they use IRC or installed a graphics card.
The Nirvana of here is when you just post shit that you are interested in, and one or two people who are also interested in that thing that you are personally doing follow you. You want mass appeal? Go on Xitter and just rip some memes from some users and post them here it works like clockwork. Which is why I don't care about interactions that much. That's probably not exactly what you meant about interactions or social.
But the main point I'm trying to make is I don't really give a shit, and that's how you win. Just stop caring and somehow it works. Shit's not that serious.