I'm sorry this is not something I have had experience with either. However here are links to some articles, from PsychCentral's archives, on the subject of grief & loss:

https://psychcentral.com/lib/on-grie...-coping/?all=1

https://psychcentral.com/blog/health...avigate-grief/

https://psychcentral.com/resources/G...upport_Groups/

https://psychcentral.com/lib/the-tru...rief-and-loss/

https://blogs.psychcentral.com/mindf...dium=popular17

https://blogs.psychcentral.com/menta...dium=popular17

https://psychcentral.com/news/2006/1...dium=popular17

https://blogs.psychcentral.com/bondi...o-get-unstuck/

My best wishes to you...