Posts which start new discussions go through a quick review process, where members of good standing check posts for anything inappropriate. Until that speedy check is done, Anonymous Monks can't see those posts on the Newest Nodes page.
We consider this site to be a home away from home, so we treat it as such. We have some standards, and we try to keep our home clean according to those standards.
The post should be understandable, both in language and formatting. This doesn't mean that your post will disappear into the ether if it doesn't fully satisfy our sky-high standards. But if we don't place the goal high, how will you learn to jump?
Approval usually comes in 30 or 40 minutes. If you don't see it by then, and the site seems active (the Newest Nodes page is adding several new Notes every time you refresh the page), you might have had a submission problem.
There are a few options for you.