Welcome to PC!
A tour? Well, for starters, you're in New Users/Welcome, where introductions are made.
Take a look at the forum index - that's where the forum categories are shown, along with its subforums or something. Check them out one by one, or simply go for whatever you're most interested in - anything won't hurt! As long as you checked the rules and anything specific, you should be fine around the forums.
That said... I wonder whether you'll be active? I hope that you can become active around PC. Have fun!