Peace ginger,
Why should it matter if the word "Trinity" is the ine Bible or not when the real Trinity is in the Bible?
The Holy Spirit is not angel as He spoke through the prophets and gave then power. He is of the essence of God being the very Spirit of God.
The Father is the LORD who controls the heavens and the earth.
Jesus is the Son ofMan who is seated at His right hand and in Psalm 110:1 He is called "Lord".
What Christians believe about the Trinity is not a made up thing, it's real.