Welcome dude. 

My advice, just check out interest checks or any RPs with premises you find interesting. PM thread owners with questions, check out character bios for an idea of how things are done. 

There is a tabletop themed section, but regular RP is often based on existing universes anyway, including forgotten realms occasionally, and especially Warhammer.

It's an RP forum like any other. Seen one, seen'em all.