With only the Windows 11 drive installed on your PC, when you boot up from it, are you sure you cannot access the recovery environment using these steps, it really would be the easiest option to resolve all the problems.
Start your PC, just as Windows attempts to load (spinning dots), press and hold Power Button for 5 - 10 seconds to perform a Hard Shut Down
Do this twice
On the third start Windows will boot into the Recovery Environment and from there you can access System Repair, Safe Mode, Command Prompt... etc.