Peace,
"Trinity is a man made concept!!"
You have just given me your personal twist on this, it is by no means true.
In the OT God is referred to as the LORD, the Lord God, and the Spirit of the Lord.
How can this be explained?
"I am sorry to say that u havent given a very convincing explanation. "
What will convince you? Can you be convinced?
Like I told you, God is FAR FAR FAR beyond our comprehension.
Don't expect everything about God to make sense to you.
Don't be foolish.
You will omly fall into the devil's snare if you wish only to accept what you understand.
Blessings