Hiya! Over on the left you can see two big folders. One is for rules reference and player information, and the other is for the worldbuilding. The last one is the Mechanics Database, which you can effectively ignore (it’s just storage :P).
If you choose to check out the Player Handbook please make sure to look at the !Disclaimer. If you’d like more information about my goals and expectations, check out the One-Way Session 0. Finally, the Setting Introduction gives you a very high level overview of the campaign setting.
No matter what, you can always DM on Discord with questions. Happy reading!