iATKOS | United Kingdom

hi!! if anyone sees this pls give some sort of input because i have no idea what to do: i have seemingly completed the update from ventura to sequoia (2017 macbook pro, 13inch w/ touchbar) but when i get to the login screen and put in my password, it says loading for at least thirty minutes. i have tried restarting a good few times now and that has done nothing — what do i do? did i mess something up? every time i power on it pulls back up the screen where its like “ install macos / open disk / install sequoia “ and pressing open disk takes me to the lock screen but wont sign in. help?