Looking for experienced guidance - overcoming BitLocker on new Windows 11 PC

I'm not pro-Windows 11, but I am stuck and need some guidance from people who have actually dealt with bypassing BitLocker for doing backups from a USB Linux Live ISO.

I've detailed my situation at the following:

Attacking the problem from both fronts, if anyone can assist with the Windows 11 only solution until I can get my first system backup would be very much appreciated. What I tried and failed at detailed in the following post: