If there is any documentation, can https://community.openstreetmap.org link to it?

The way it’s been done https://community.openstreetmap.org/t/how-to-use-this-forum-for-new-users/314 isn’t really a solution to this problem - I just looked for this again and couldn’t find it again. If there can be only one FAQ then it needs to be above the “etiquette” gubbins, not below.