Here is basically a small tutorial on how to Role Play. Let's start with some examples:
Raven:*Looks at you with an angry face* Father, leave my friends alone!
Trigon: It's not your friends I want, it's their world I want!-Laughs Maniacally-
Raven:You can't have it! *Blasts you with dark power*
Trigon:-blocks- silly girl, you have no power over me!
And scene. Starting to get the picture? Well notice how Raven uses * to indicate actions and Trigon uses -. Of course you can use other symbols or caps.
If you want to start a Role Play then simply just start a forum, I recommend starting up a scene, then bring your character in and leave room for others to join in, let's see how the Raven and Trigon conversation started:
Raven:It's the middle of the night, I'm walking in the park. The night is cold and dark, and ever since I left the Titans, I've felt an emptiness inside me. *I hear this rumbling in the background, I turn to see you looking at me with an evil grin.*
Trigon: I can sense your loneliness, daughter. It's been ages since you felt this way.
We'll end that there. If you have any questions please don't hesitate to ask me or a moderator.