When people arrive at our site, they'll be directed to /help/on-topic for guidance about what's on-topic here. Said page currently contains basically nothing useful; I can tell you that without even looking at it.
However, we have moderators now, and we can edit that page. So - what should it say?
Propose some possible help center text in an answer. After a while, we'll amalgamate what we can and come up with some content to put in the help center that'll actually help when people come to visit.