I need help, accidental update without OCLP

I NEED HELP, PLEASE.

I'm using MBP early 2015, OCLP Ventura. Few days ago I accidentaly update using the normal way without OCLP. When restarted, I can't login because it says my password are wrong.

I can't copy the data to another place because the FileVault is on (i dont even know how and why its on). Help me, i cant login through USB Bootable because it doesnt recognize my password anymore.

I need help, please help.