@Iseabail Sky Hi there and welcome to RPG! :D to get started go and check out either the OOC sections fine an RP that interests you, read through the rules a GM provides and fill in the CS (character sheet) that is provided and then wait for approval then you are free to start. Or look through the interest section find one that interests you, and then wait for the GM to get the actual thread up, and the same process.
Further questions feel free to send me a PM. :)