As far as I know you can make announcements, just the same as I can....In the announcement section.
As for being a Mod....To be honest you really do have to be just a little bit older to be one.....That way you are being wise in the actions you take....I do hope you understand what I mean, and won't hate me for what I've said.
And I really don't mind at all being the only one here at the moment. xx