Welcome Frenzy!
It can be a bit daunting to join role-plays when you first begin, so what I'd do is explore, and when you get to know the place pop over to "Flourite Plains" and just watch the chat, there should be loads of advertisments for role-plays. When you've seen one that you like, follow their instructions and they should be very helpful if they want you to join.
If you need any help, ask in the help section (funnily enough).