Help or a guide please?

I just joined and read all the 5 books of the Olympians And the one book Of Heroes of Olympians

And I Don't really know this Site [Just joined :P] Seems pretty cool But I Have NO idea of what to do?
Could someone Kinda explain this site,... or is their like rules, introduction etc.?

This doesn't belong here. Visit Rules & Joining to learn how to create a character and how to roleplay. If you'd like, go the Chatbox and ask some questions to people there. Most people know the basics of the site and will help you.

I'd be willing to help too, I've been on the site for a long time.

Okay... I've role played before... I know how to role-play...

First, did you read the rules? If not, reading them should help. Post your character in the rules and joining place, filling out the template. If it's accepted, you can RP.