Ok let me be the first to say welcome to the site. Every thing is straight forward. First read the rules. Forums are subjects which you can talk about and start your own. The arcade is an area where you play games. You can try to beat peoples scores and win trophys. Again I say welcome and enjoy yourself. You shall a blast. I am. Oh and one more thing I notice you don't have an avitar. It is a picture which expresses your personality. Go to the top right of the screen and click "my panel" and that will give you further instructions.