Hi, this is Kai, though my username doesn't reflect that for today. I felt like being the Lord of Nightmares. Don't worry. This won't come up unless I end up GMing for you.
I believe you already popped into chat today, which is excellent because it's where a lot of the community-bonding and RP recruitment happen.
For plotted RPs, keep an eye on the OOC Discussion Forum. It isn't called that today, but it will probably be renamed again before long. Gamemasters post there looking for players for their plots, and if you want to be involved, you post in there before jumping in.
If you want a place to keep information about your characters, the Character Closet (same deal with the name) is a good place. Just make a thread for your characters and keep them all in there.
Once you feel like you've got a solid idea of how the setting(s) work, and that you know how your character(s) fits in, there are several people who can make you an account on the wiki.
For Gaera's setting information on the wiki, I recommend going to the
main page, and then clicking on Gaera Main. That'll take you to the big front page for
that setting.
We do have other settings, and you can get to them the same way. It's just that Gaera tends to get used a little more heavily. If any of the others interest you, feel free to poke whoever's listed as a contact or expert so that he/she can hook you up with some roleplaying.
Hope to see you around. Contact me if you need me.