But premise 1/2 can be replaced by anything that proves the universe is not infinite, like: if the universe excisted for an infinite time, we could not have a tomorrow. As we would have more than infinite days.
Not quite. Infinity plus one is still infinity.
But the question I have, is: what caused the big bang? Because it either must have a cause, or a supernatural power created it.
Why? Why does something have to have a cause and even if it did, why could the cause not be something totally trivial?
Anyone so limited that they can only spell a word one way is severely handicapped!