Since you're new to RP and to this site, I'd recommend starting off in either the Free area or the Casual area, which will help acclimate you to how RP and this site works in general. It's fairly easy and I'm sure you'll find a subject matter which suits your taste if you look around a bit.
If you have any questions, this guide is very helpful to skim through. If you find yourself with a question that's not covered in the guide, feel free to send me a message and I'll be happy to assist you in any way that I can. Meanwhile, enjoy yourself and maybe I'll see you around the forums.