I am glad you are discharged. I think you are doing very well considering that he just passed. Your grief is expected. My dad felt a little better after first death anniversary of my moms. He felt acceptance to some degree. First year was quite bad. For all of us. I’d say grief never goes away, it just takes more manageable form
There is a grief support forum but it’s not active. I think you could try relationship forum or coping with emotions forums. Those are forums for everyone. People would only read on depression forum if they suffer from depression themselves or follow “new posts” feature (like I do). But I probably would miss good threads and posts on here if I didn’t check “new posts”, I check other forums frequently
Grief is universal and you’ll get responses on those forums.
I have a book “grief one day at a time”. Short passages for daily readings. Got it from Amazon. Something like this might help