My condolences on the loss of CMM. He left this earth the way that he wanted, i.e., on his own terms. You and your son were right there with him throughout his journey and had the opportunity to say goodbye and hold his hand during his last few hours of life.
I hope that you have family and friends nearby that can be there for you and your family during the days ahead. I am keeping you and your family in my thoughts and prayers.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.