AU where James Potter has a twin (you)

Also, Hogwarts is more like a wizarding early college, like high school, in which students start to specifically focus on what they really want to do professionally before they head off to actually wizarding colleges.

You live with Bathilda, who's actually really sweet.

You work for Aberforth at Godric's Hollow.

There's a random librarian named Dashiell Qwerty (IYKYK)