Wwlcome! If you need any help, feel free to ask around. There's plenty of kinds of RPs you can get into around here. You can also put up Interest Checks to advertise your own ideas to other RPers. You can use the forums to RP, or you can opt to have more private RPs using the PM system.
Hope you have fun! Don't get discouraged if a few RPs don't work out right away. Eventually someone will come along and you'll write amazing stories together.