Imagine I wanted to get a basic understanding what the everyday life of a Soviet soldier (especially infantry, tank units, air force) during WWII was like.
What books and other resources in English, German, and Russian contain information on this?
There are some good descriptions, but mainly in Russian fiction and memoirs, for example:
Vasili Grossman, Life and fate (there is an English translation),
Victor Astafiev, The Cursed and the Slain,
Also the memoirs of Lev Kopelev, and short stories of Vasil Bykov.
There is also a very high quality, realistic movie: Torpedo bombers (Торпедоносцы) (can be found on Internet).
If you haven't read Aleksandr Solzhenitsyn, I would highly recommend him. While not exclusively about WWII his books discuss WWII soviet soldiers both during the war and what they faced after the war. Solzhenitsyn especially focuses on after WWII and those who didn't fit neatly back into Soviet Union. Solzhenitsyn himself was a WWII soldier who followed a similar path of his novels, ending up in Stalin's Gulag system for nearly a decade after the war.
Comment from FranzDrollig
I downvoted this answer because Solzhenitsyn's work IMHO is gazillion times less realistic/trustworthy than Grossman's (even though large parts of "Life and Fate" happen outside of the battlefront). It is unbelievable that anyone could take Solzhenitsyn's work at face value in 2019.
@FranzDrollig Solzhenitsyn beyond being one of the most brilliant minds of the 20th century was also WWII Soviet officer. His early incomplete work "Love the Revolution!," chronicle his personal war experience. His later works of which I mention cover WWII and a soviet soldiers WWII experiences in depth. He writes of how 10 million Russians including many active duty soldiers like himself, fell afoul of Communist Party and ended up in a Stalin Gulag. He explains in great detail the daily activities of such men before, during and after the Gulag.
Solzhenitsyn himself went from a decorated active duty officer, awarded the Order of the Red Star, his second decoration, to being interred in a Gulag for a decade. As for Alexandr Sozhenisyn being a creditable source..
If you really want a treat, Read Solzhenitsyn's 1978 commencement address at Harvard where he critiques the west. It's one of the greatest speeches of the 20th century.