It is not for we humans to know the answers to these questions. We work out our own salvation and other people’s salvation is between them and God.
My layman’s opinion.
I’m with you, i. What we don’t know for sure about the details of the mind of God would fill libraries and kill billions. We take our best shot at doing what we honestly think we should, and trust that God will take it into account. We acknowledge that however the universe was created, it wan’t done by us, and we’re damn lucky to have it. We believe that something intangible connects all of us, past, present, and future, and we draw strength and meaning from that connection. Whatever the true nature of The Universe And Everything is, it is beyond the scope of our perception or comprehension to pretend that we can see it all. We give thanks for the possibilities laid before us, and pray for guidance and humility.