If you are new, you should probably at least try to join another RP. This isn't a rule, and i'm not suggesting that I think you can't manage a roleplay. Rather, it's an uphill battle to get an RP going as it is, but doing so when you don't know anybody is something next to impossible. 

Find the people who share your tastes and interests, get involved in their RP's and show them that you know what you are doing. When you have built a name for yourself, make an RP.