Howdy and greetings from the Great White North sir!
It is interesting that your focus seems to be the snowy steppes of Northern Europe, as mentioned by your collection of Imperial Guard Valhalla and love of Napoleanics.
I recently viewed several excellent videos about the Nazi attack on USSR and their demise at Stalingrad on YouTube and highly recommend them!
Army University Press provides excellent graphics and breakdown of the options and actions used from a strategic as well as tactical view.
https://youtu.be/1K0SFr2gPbc
Another audiobook series to check out is the Red Baron Audiobook series, with excellent first-hand personal accounts of action on the Eastern Front.
Cheers and wishing you the best!