Can anyone articulate why a god exists?, page-104

"You show me evidence and if I have the ability to understand it I will take it on board and abandon something I have believed in deeply for 50 years or more. I have a tenuous grip at best on my beliefs."

I'll try, even though I think that the chances of success are low.
My challenge to your beliefs is that your proposals appear to me to be based more on lack of evidence or even the ability to provide evidence to support or refute such proposals. I think that we have no knowledge to help support you statement:

"So this consciousness we call God is without beginning also, I imagine, because everything in the entire universe or multiverse also has had no beginning, universes come into being from stuff that has always existed. Therefore for me at least it's not a long stretch to accept that life and consciousness have always existed, they may change and transform, but the unit of existance is eternal. Neither beginning or ending, just changing, evolving. The only constant being this entity, force, substance we call God."

Religious people make statements that can't be supported or refuted by rational evidence, and then claim victory. I believe that your claims fall into this category, although you do also claim to be willing to change your mind - which is refreshing.

All I can do is appeal to your stated belief in science. A proposal needs to have a path to both verify and refute it through evidence. I submit that neither can be done for your proposal. I further submit that consequently your proposal is really a faith statement in the sense that many religious statements that can't be verified or disputed are.