Your idea isn't crazy at all. I usually recommend typing up letters and then tearing them up instead of trying to the spouse how you feel, etc.
Just make sure that when you send them to another email address that you delete the "sent" version from the original address.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.