I am sorry to hear about your loss and my heart goes out to you. You are right. I encourage anyone in the community, especially single fathers who can relate to you, to jump in with their kind heart.
The words of support that I can offer you are from the perspective of a daughter of a single dad. My mum died a few years ago, not long after a miscarriage, and I have watched my dad go through the cycles of grief. It was never clear to us what caused mums death. It seemed like a number of complicated situations.
He has been angry, sad, upset, anxious, nervous, hopeless, and its been very hard for him to find his own identity and build new relationships with his children. I think he finds solace in talking to family members, looking at mums photos and reminiscing on their time together. He is strong and he has his days.
Michael, you are not alone. You are supported. Everything you need to get through this is within you. There is light at the end of the tunnel. It is okay to take it one day at a time and return to your breath as needed throughout the day. You are welcome to reach out any time. We are here to support.