I certainly didn't claim to know. But at this point in history, if you want to have the highest chance of making the right guess: I would strongly suggest you go with the scientific consensus that the universe began with a Big Bang and is therefore not infinite, and the consensus of physicists that the observable evidence suggests the universe is not infinite for other reasons as well.

I kinda have to assume you didn't connect the facts that an infinite universe rejects the Big Bang model? Because there is definitely plenty of evidence for that model.

Yes, there are epistemic limits to science, that does not mean it's not evidence. And an infinite anything is an extraordinary claim. It's practically the most extraordinary claim.