Are you just wanting to create a boardgame listing? Or something else?
Just listings. What else can there be?
Anything under the Community -> Contribute menu. Boardgames are pretty straightforward to post though!
1. first create a regular account 2. go to Community -> Contribute -> Board Game (https://boardgamegeek.com/item/create/boardgame) 3. post all the info you can think of, the more detail the better 4. submit and wait for moderator approval
One thing you could do is add "Board Game" to the end of the title when submitting the new one. It looks like someone has already submitted the new 2HDC game (listed as "2 Hour Dungeon Crawl Board Game") and it's pending approval. See boardgamegeek.com/items/boardgame/pending/page/1
If you give me the info, I can post one for you, or we can do a chat or something and I'll walk you through it.
Other things you might want to do is go to your existing game listings and make sure they're correct/up-to-date, update the company or designer (that's you) profile pages: