Random story ideas with almost no plot & writing help

Some random book ideas that have definitely been done before but why not u do u

-any demigods go to hogwarts
-literally the origin of any ship
-please I need more divergent fanfics
-one shots
-headcanons
-pictures
-memes
-random shit
-writing tips
-I'm running out of ideas
-someone give me tips to stay off my phone in the middle of the night
-sketchbook tours lol