PLEASE HELP!!)) 17X4

Okay so I have this storyline I came up with, but it seems really familiar and idk if that's just because I wrote it or if it's something I've read before and copied without realizing. Can anyone please just read over this and tell me if it seems too much like something else you've already read? I wanna actually try writing and finishing this as a book, but I don't want to put all my energy into it if it's basically someone else's book and I could get copyrighted. Thanks :')