Where can I find good information on this, preferably individual stories on the matter
There are many stories. A very good one is that of General Walther Wenck, commander of the 12th Army, which Hitler called on to break the siege of Berlin. After trying and seeing it impossible, Wenck pivoted his troops to the east to help the beleaguered 9th Army escape across the Elbe. Wenck was the youngest general in the Heer and his move to rescue Busse's troops was one of the biggest efforts to have troops surrender to the western allies rather than the Soviets.
A good collection of personal accounts from that period is a book called "With Our Backs to Berlin."
A great book is Traudl Junge's Until the Final Hour. She was Hitler's secretary in the Berlin Bunker. The movie Downfall is based on her memoirs.