1. Whatever begins to exist has a cause
2. The universe began to exist
3. Therefore the universe has a cause.
Stage 2
1. The universe is the totality of all time space and matter.
2. Whatever caused time space and matter must be timeless, space less, and immaterial.
3. Therefore something immaterial, timeless, and space less caused the universe, and these properties are said of God.
4. Therefore we conclude God exists.
Obviously a lot to unpack and defend,