I'd recommend having a look at all the forums there are to see. There are so many sub-forums related to any kind of interest. And there's the aquarium for making a bit of cash. And of course making dream avatars on tektek is practically an established past time here.
Oh and welcome to Gaia!
[[I don't think it's silly at all. There's a lot to Gaia, and if you want to enjoy this place, then waiting three days to get the gist of it and to prove you're not a bot is nothing. I've spent years on this site. Three days is nothing. In that time, you can explore the forums and guilds and find some fun places and make some friends. Once the three days is up, you'll have a handle on what you want to do.]]