I never became aware of any trinity, all I know isAs per the above which you have quoted: The Trinity is not a requirement for salvation. The Trinity is something you become aware of as you grow deeper in your walk with God. It is a revelation of truth.
It has nothing to do with you being void of the Spirit.
example: I know many spirit-filled believers who do not speak in tongues. Does that make those believers any less spirit-filled because they do not speak in tongues?
1Jn 5:7 For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
but in understanding when all christians finally agree with Jesus, and God we would all be as one, even though there are thousands of us. doesnt make us one person, though we be one body.