Hey you! You have been invited to this forum during its private-only stage because we think you (yes you!) can contribute something interesting that we can show off when we make this public!
So go ahead and do that! You can either use the post editor here to write (you can include math with dollar signs, note that if you want display math the double dollar signs have to be on separate lines), or you can write on your personal blog and then drop a link here.
You can also use https://docs.localcharts.org (a hedgedoc instance: it’s like overleaf for markdown) to collaborate on drafts, and then copy/paste markdown over to localcharts when you are finished.
Or you can drop links to previous stuff you’ve written, or even to arXiv papers that you’ve written or you liked, as long as you provide a quick summary and why you liked it.