Hi! Welcome to Gaia. If you are lost, just explore around for a while. There are games and a variety of forums to post.
Don't forget to click the header links (Home, My Gaia, Shops, Forums, World, Games) and the machine in the left for free items. You can also visit my thread for more free stuff and don't forget to follow the instructions for Achievements in your achievement page (click the little cup above in the far left corner), since those are good guides to different activities. 3nodding
Post anywhere and you'll find someone friendly and get gold for doing so as well. If you like a smaller crowd, find a guild to suit your interests. Or play games and make gold while just having fun on your own. Then go brows the shops and play avatar dress up and show off your own style.