Welcome to the CFS my friend.
First of all, I do not know you at all but allow me to say to you that it is illogical to claim that since the word “Trinity” is not found in the Bible that its concept is not taught therein. This kind of objection usually demonstrates a prejudice against the teaching of the Trinity.
Second, there are many biblical concepts that people believe in that don’t have a
specific word describing them used in the Bible. For example, the word “bible” is not found in the Bible, but we use it anyway to describe the Bible.
The
"word" Bible is not found in the Bible! Think about it for a moment.
Likewise, the words “omniscience,” which means “all knowing,” “omnipotence,” which means “all powerful,” and “omnipresence,” which means “present everywhere,” are words not found in the Bible either, but we use them to describe the attributes of God.
Here a a couple of more:
Divinity which means divine quality or godlike character. Yet, we speak of the godlike quality of the Lord God. See Psalm 139.
Incarnation which means the word (God) who became flesh. Yet, this is definitely taught in the Bible
(John 1:1,14).
So, to say that the Trinity isn’t true or you do not use it because the word isn’t in the Bible is an invalid argument. Furthermore, to say that if God wanted us to believe in the Trinity He would have clearly taught it in scripture, is also an invalid argument. Something does not have to be clearly formulated in the Bible to be valid. Not all things taught in the Bible are perfectly clear. Take a look at the book of Revelation.