if i was in harry potter book ~1~in the first year unfinished

hi destiny midnight and I was basically teleported by someone telling me that I need to fix the harry potter universe or it will destroyed all universes entirely, somehow someone is messing up the harry potter universe we need to fix the harry potter universe

1. just some information is that draco is a bit more nicer than his real life movie self
2. i put some of my fandom characters in my book
3. draco has an older sister in my book