On objective moral values, they’re not physical things, just like numbers or logic aren’t made of matter. They’re real, but they’re grounded in the nature of God, not in human opinion. That’s why things like murder or injustice are wrong no matter what culture you live in.
On an infinite past, you can’t actually get to today if there’s an infinite number of days before it. You can have a “potential infinite,” like counting forward forever, but not a completed infinite you’ve already crossed.
On DNA and physics, DNA is loaded with information, like a software code, and information always comes from a mind. Physics shows the universe is fine-tuned in ways so exact that blind chance is incredibly unlikely, which points to intelligence behind it.
On the second law of thermodynamics, the universe is running out of usable energy. If it had always been here, it would have run out already, which means it had a starting point.
On the Big Bang, yes, it’s a model to explain things like galaxies moving apart and the cosmic background radiation. But when you put those observations together with the second law and the fact there’s no good evidence for a past-eternal steady state, the simplest explanation is that the universe had a beginning.