Look to join a group in a genre you enjoy (best = text & map only, because Skype/ Voice etc does not get recorded), tell the GM that you want to 'lurk' for a while before you create a character, and after you are added, go to the Campaign Details page, and click on the 'chat archive' button. Read thru and figure out what is going on. Look through the Forum Posts for the Game/ Campaign. Put the story-parts they have created together in your head, and see if that is the kind of story that you would like to help make in the future. See if anyone else needed help creating a character, and try to follow along if they did. If so, ask the GM your questions in PMs (please don't clutter up the Forum for the Game), and create a character and join in! I'm running a Roll20 Mutants and Masterminds 2nd Edition game, text and maps only (Super Hero Genre), on Monday Eves, 5 PM, PST. Episodes usually last about 4 hours, and you are quite welcome to join, 'lurk', learn, and play!