No that not possible! Hagrid should be a student at this point not a ground keeper! The hell? The whole place and people is all over the place. Sigh author please review the time line I think there is allots of holes in your time line and characters. This is really getting to me, sorry I'm trying to be a pain but so far I'm not convince in your research of the potter universe.
I hope we get a ravenclaw who actually study magic in this fic, it feels sad to see so few stories with a mc that actually is interested in learning how magic works instead of just a few battle magic spells and move on
Willox