System upgrade to fedora 39 failed

system upgrade to fedora 39 failed, on Lenovo thinkpad E585. May I force power off and reboot. How bad is the problem? Is there a way to prevent loss of data? Please help! This is mind boggling, and at this moment beyond my capacity to resolve. Thank you.

Pressing CRTL+ALT+F3 from the Oh no screen, I am able to login.Please What are the steps to fix the system?