Just so I don't really screw something up...

So I'm brand new to this part of the Steven Universe Wikia, and am still unsure of just how much I'm allowed to do. Am I allowed to just go and add every single one of my gemsonas/gem OC's? Are there minimum requirements for each page to have? Is there a certain termonology I should be using? Sorry if this is a lot of questions, but I'm an insecure notice who really doesn't want to do something wrong. If anyone here would be willing to guide me through the do's/don't's/right's/wrong's/etc., I'd be incredibly appreciative. Thank you!