Well, what is there to know, Darkchaosz?
Just look for some threads you like, post in them, make some friends, and have fun. It's a pretty simple concept if I do say so myself. xD
Any how, welcome to the Pokecommunity. I'm sure you will have fun here once you figure everything out. I suppose it can be just a tad bit daunting when you first visit. :o
However, the vast majority of members here at PC are pretty gosh darn friendly. I'm sure you can ask almost anyone for help around here and recieve quite the nice response.
Hope you stick around. Perhaps I shall see you again.