I’ve pinned the Welcome to the Observable Forum topic globally. This should be the first thing everyone sees when they enter the forum, and I’ve edited it to describe how to report an issue, which is to open a topic in the Site Feedback category.
Per your other feedback, we’ve also changed the keyboard shortcuts for moving cells on non-macOS platforms to Control-Shift-Up and Control-Shift-Down. (They’re still Option-Command-Up ⌥⌘↑ and Option-Command-Down ⌥⌘↓ on macOS.) And we’ve moved the “Help” action to the notebook menu (⋯) from the user menu (avatar).