A newbie saying hi
Hello and welcome! :D
If you have an idea of what you want to play, you can browse "Wanted - Players" where GMs advertise the games they have that need new players.
"Wanted - GMs" is where you can go to make a request for a GM for a game you don't see listed.
"Game Proposals, Input, and Advice" is where you can go to pitch games you want to run, and see what sort of interest there is in them.
You can also do a search for specific game names, GMs or systems, it's at the bottom of the main RPoL page. You will want to look for the * at the end of the game names, as these are the games that are looking for players.
If you have any questions regarding getting started, this is the place to do it. :)
Hope you enjoy your stay!