Re: Characters?
No, you go to the Players Wanted forum and check out games looking for players, or you can use the search function from the main page to search for the types of games you want to play (setting, rules system, etc). If you check the option for "only games accepting new players" then you can browse the results and find a game to apply to. Any game with a red asterisk next to its name is accepting players.
Definitely read the FAQs for beginners to familiarize yourself with how things work.
Welcome to RPoL. :-)