Macbook Air - Hangs after Big Sur update

I was updating my MacBook Air (2020) to Big Sur and after 4 hours it did not display anything onscreen. I waited for another 2 hours and I had to force shutdown. It boots up to the screen where it prompts me for the password and once I enter the password it goes to "You shut down your computer because of a problem. If you want to open the applications that were open when you shut down, click open. If you do nothing, the computer will continue the login in "N" seconds. I have tried waiting till it goes to 1 second and it hangs there. When I click cancel, nothing happens. When I click open the rainbow wheel spins for hours. Any idea how I can resolve this?