I'm sorry your marriage is coming to this. I can't really be of much help personally since I'm just an old recluse. However here are links to a selection of 9 articles, from Psych Central's archives, that (hopefully) may be of some help:

Shocked that Your Spouse Left? Here's the Secret to Recovery

When One Spouse Wants Out of the Marriage But the Other Doesn't

Letting Go and Moving On After a Breakup or Divorce

12 Ways to Mend a Broken Heart

Love, Heartbreak & How to Recover

https://psychcentral.com/blog/5-help...ce-depression/

https://psychcentral.com/blog/how-to...le-tips/?all=1

https://psychcentral.com/lib/kids-an...-tough-issues/

https://pro.psychcentral.com/exhaust...ing-a-divorce/

My best wishes to you & your family.