Well hello, silent enigmatic one.
I am a person who is not new.
You may be able to guess my name. Maybe not.
Since you are new, I've some links to help you find roleplay important aspects of 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!
If you need any help, please do ask.