Hello and welcome to Iwaku, one of few words. ;]
I'm Kitti and it's good to meet you.
We'll drag you into roleplays and pretty soon, you won't be new...
You'll even lose that "fresh meat" smell after a week or two.
Since you're new for now, though, I have some links to help you around the site:
This is where you can sign up for the roleplays found in Modern, Scifi, Fantasy, and sometimes Mature. Generally, they will have you post a character sheet in their thread, a new sheet for each roleplay! You can also start signups for a roleplay of your own here.
This is where you can find jump in games, which typically have no sign up thread. You just start posting!
This isn't all we have to offer and you should definitely poke around on your own, too!
If you need help, please do ask.