What would evidence of a God even look like?

[RozKek]

Before we try to find evidence for a god, we need to figure out how the metaphysical can interact with the physical. Makes no sense to me. And if god is physical, then surely we'd find signs of him. If god is physical, then he's deterministic and completely predictable. If not, then he's random, and I don't see a god in any of those options. In other words, god doesn't seem physically possible.

Edit: The idea that the universe itself is God, it doesn't make sense to me. It still stands that he's either completely predictable or has a bit of randomness (but still deterministic and predictable in bigger scales). That doesn't seem godlike to me.