Well go back to the original languages and learn!
Elohim--plural of Elowah
Adonai- plural of Adon
One in the Shma is "echad" which is used in hebrew for a compound ONE-- We would say the New York Yankess is one baseball team that has 25 co-equal players
Then Jesus being called God in multiple places and the Spirit called God- not to hard to understand!
But I am going to ask you to take a hard look at teh SHMA and think:
Deuteronomy 6:4
Hear, O Israel: The Lord our God is one Lord:
The actual translation of this verse is this:
"Hear O Israel, the Lord our God, the Lord is one". If they knew
god was only a single entity and not a triune God why would you have to say this? This is a superfluous use of one that makes God kind of bad at grammar. But when you understand that God was slowly revealing His true self over time- it makes sense that Yahweh (S) our Elohim (p), Yahweh is one (ordinal and not cardinal one)