Religion

And has been nonsense for 1800 years or so since it was more or less invented. The christians of the 200s-400s spent a lot of time arguing about and frequently killing each other over ‘the true nature of christ’. The intervention of the Roman State, starting with Constantine, resolved the dispute (with state violence of course) in favor of the absurd trinitarian ideology.

The christian god is three divine entities all of which are eternal and all of which are basically aspects of the one god. There are no logical rational answers to your questions as the belief system is irrational at its core.