Welcome aboard, pikamon999! The members above you already taught you how to edit your signature, so if you still have any questions regarding the forum, try to check out the FAQ! :)
There's a lot to explore here in the forums, PC offers you everything related about Pokemon, but there are also non-related ones, so I'm certain you will find the section you really want to get into! If you need some tips about fitting around and make some friends, don't worry about that! No need to, just be yourself, and you will get along perfectly fine!
A certain reminder again, read the rules and follow them always! If ya have any questions, feel free to ask me! See you around, and enjoy yourself. ^^