If you added a forum category, you ought to have something in mind you want to discuss about it. Ask real questions that you actually care to contemplate.
It’s hard to be asking into empty space at first, but get over it! Your own social site starts from your own social circle. If you take it as a fun adventure, it is going to be a fun adventure for everyone involved.
You want admins to get a bit more comfortable with you first.
This is a micro-social-network already and you need to put the first wires together. The big busy world may not really care that much about your friends, and they may not be eager enough yet to promote your site on their own.
Just activate what you need - Profiles, Photos, Videos, Music, Groups, Events, Blogs, Forums, Files, Messenger, Chat, Store, etc.
It's like all those popular social sites mixed in one.
When you were making photos, you should have thrown out 9 out of 10 shots.
Link from within content.i) Create 2 topics in every section of your Forum.