RE: Is God One or Three?

The Christian God is the Blessed Trinity: The Father, the Son, and the Holy Ghost.

It's a sacred mystery so it isn't explained, but basically each of them is fully God (as opposed to 1/3 of God) without there being three Gods.

In other words, the son Jesus Christ is the creator of heaven and earth in His entirety, regardless of if the other two exist or not.

I recommend just focusing on Jesus Christ and the Blessed Virgin Mary, since they're the main figures of the faith.

https://youtu.be/9f4BJgaOStI?si=26SaPcPXAq1cBeEa