The Trinity (a discussion)

One of the more reknowned in a series of triune God theories throughout the history of religion is that of christianity, following the story according to scripture, this is the best understanding I could come up with

So God asked himself to go to earth to save mankind. Then he agreed with himself and volunteered himself to himself to offer himself. Then God impregnated a woman as himself, with himself. God prayed to himself and glorified himself repeatedly. God strengthened himself and talked to himself. Finally God forsook himself and sacrificed himself to prove his loyalty to himself. While dead he resurrected himself so he could exalt himself above himself. Then he sat at his own right hand and waited till he placed his enemies as a footstool Finally with Satan's forces defeated God would turn his kingdom over to himself That all things would become everything to himself.

I never understood it in Sunday school, and remain nonplussed to date, How do you make sense of it?