Hello,
which image i will use for my zero 2?
The newest disk image for zero was 2020.11 but the release notes Looks like, that zero 2 supports 2021.11 and later.
Which should i use? 
That’s for Pi Zero 1.
For Pi Zero 2, use any Pi 2 / 3 image.
I’ll make that clearer on the Download page and installer shortly.
Cheers
Sam