If you love Pokemon, then this is the perfect place to be and you wouldn't totally regret joining this place! And so, welcome to the forums, HyunJae! If your looking for friends, I'm sure you will eventually meet some as you keep on interacting with the community here through discussions, joining events & competitions, by messaging them in their profiles and etc. So what other things brought you here in PC aside from meeting colleagues and yeah? :3
As you can probably tell. PC is pretty huge, and it has lots of boards both related to Pokemon and also boards that does not tackle things about Pokemon, which in other words, off-topic boards, so at this point you can already tell that you will like it here, since if you ever get bored with Pokemon for a while you can always go to the off-topic ones and discuss other things! :]
So it is without a doubt that you will enjoy it here! To keep you informed, if you still haven't read the rules as of yet. Then please do so now, I'm sure you don't want to get yourself banned or whatnot, eh? And with that being said, have a wonderful time here and enjoy lurking 'round!