I recently discovered HelpGuide.org, a website that focuses on mental, emotional, and social health. They have quite a few articles about caregiving, grief, and loss.
Here’s a link to their webpage from April 2017 on “Coping with Grief and Loss: Understanding the Grieving Process and Learning to Heal”:
https://www.helpguide.org/articles/grief/coping-with-grief-and-loss.htm