Hi - Welcome to OA!
As Rynn says, please feel free to ask any questions you may have as you explore the setting.
For a good overview of the OA project, including an illustrated Primer/Backstory of the setting itself, the core principles of our Canon, FAQs, How to Contribute to the project, and various other odds and ends, I'd suggest starting from the Introduction to OA page located
HERE, including the links down the left side of the screen (you can go directly to the Intro page and much else using the Home drop menu at the top of the non-EG pages on the website. You can jump directly to the major sections of the EG, using the OA Universe drop-down menu).
Please do NOT feel you have to read all of these pages before taking part in the discussions taking place on the forum. Feel freel to jump in to any discussion thread that interests you or start a new one if you want. Also, as previously mentioned , we like to answer new member questions, both on general principles and because they can sometimes lead to new ideas for the setting, or the project as a whole
Hope this helps, and once again - Welcome to OA
Todd