Have you tried a commit message using either the
git commit -m "A message"
You should be able to use atom as your git editor. It looks like it’s not able to find the
atom command. I found this on stackoverflow, https://stackoverflow.com/questions/52245901/bash-atom-command-not-found-how-to-resolve-this-in-windows, that might help you. At that point, I think your setup should work.