For in him dwelleth all the fulness of the Godhead bodily

Colossians 2:8-9 KJVS
[8] Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, after the rudiments of the world, and not after Christ. [9] For in him dwelleth all the fulness of the Godhead bodily.

There is a verse in the gospel of John spoken by our Lord, that aptly describes the godhead and Jesus’s relationship to the Father.

John 17:23 KJVS
[23] I in them, and thou in me, that they may be made perfect in one; and that the world may know that thou hast sent me, and hast loved them, as thou hast loved me.

Our Lord himself described God as a Spirit.

John 4:24 KJVS
[24] God is a Spirit: and they that worship him must worship him in spirit and in truth.

Apostle John adds this.

John 1:18 KJVS
[18] No man hath seen God at any time; the only begotten Son, which is in the bosom of the Father, he hath declared him.
1 John 4:12 KJVS
[12] No man hath seen God at any time. If we love one another, God dwelleth in us, and his love is perfected in us.

How can God and our Lord both be in us, Jn 17:23? Certainly not physically. Only through the Spirit. God as a Spirit is the life force of the universe.

Acts 17:28 KJVS
[28] For in him we live, and move, and have our being; as certain also of your own poets have said, For we are also his offspring.

In my mind, all the above verses points to God the Father as the head deity, and Jesus Christ as having the fullness of God the Father in him. The definition of the Greek word translated into the English word fullness that appears in Col 2:9, has the following Strong’s definition.

Strong’s Number
G4138
Strong’s Definition
From G4137; repletion or completion that is (subjectively) what fills (as contents supplement copiousness multitude) or (objectively) what is filled (as container performance period): – which is put in to fill up piece that filled up fulfilling full fulness.

Imagine a cup of water filled to the brim and then Jesus Christ filled to the brim with the Spirit of God the Father. God being a Spirit, created the material world, and the first material thing that he created was the Word of God.

John 1:1-3 KJVS
[1] In the beginning was the Word, and the Word was with God, and the Word was God. [2] The same was in the beginning with God. [3] All things were made by him; and without him was not any thing made that was made.

There are different theological positions about whether or not God has a physical form. Jesus may have answered this question when he said this to Philip.

John 14:8-9 KJVS
[8] Philip saith unto him, Lord, shew us the Father, and it sufficeth us. [9] Jesus saith unto him, Have I been so long time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then , Shew us the Father?

Which fits with what Apostle John wrote in John 1:18. Personality I view God as a Spirit with no physical form. He permeates the entire universe and is the life force for all living things. You can’t hide from him as He is everywhere. His ultimate purpose is to be all in all.

1 Corinthians 15:24-26,28 KJVS
[24] Then cometh the end, when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power. [25] For he must reign, till he hath put all enemies under his feet. [26] The last enemy that shall be destroyed is death. [28] And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God may be all in all.

In order for God to be all in all, all have to dwell in love.

1 John 4:16 KJVS
[16] And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him.

I don’t see the trinity doctrine in the scriptures outside of one verse.

Matthew 28:19 KJVS
[19] Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost:

With some research on the web, you will find that Eusebius wrote Mt 28:19 like this.
““With one word and voice He said to His disciples: “Go, and make disciples of all nations in My Name, teaching them to observe all things whatsoever I have commanded you,” — (Proof of the Gospel by Eusebius, Book III, ch 6, 132 (a), p. 152). Eusebius was the Bishop of Caesarea and is known as “the Father of Church History.” He wrote prolifically and his most celebrated work is his Ecclesiastical History, a history of the Church from the Apostolic period until his own time. Eusebius quotes many verses in his writings including Matthew 28:19 several times. But he never quotes it as it appears in modern Bibles. He always finishes the verse with the words “in my name.””
Source-http://www.trinitytruth.org/matthew28_19addedtext.html

It is a simple matter to do a word search on the words baptized and baptizing to see in what name or names were used by the Apostles when performing baptism.

Acts 2:38 KJVS
[38] Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.
Acts 8:16 KJVS
[16] (For as yet he was fallen upon none of them: only they were baptized in the name of the Lord Jesus.)
Acts 8:16 KJVS
[16] (For as yet he was fallen upon none of them: only they were baptized in the name of the Lord Jesus.)
Acts 10:48 KJVS
[48] And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days.
Acts 19:5 KJVS
[5] When they heard this , they were baptized in the name of the Lord Jesus.
Romans 6:3 KJVS
[3] Know ye not, that so many of us as were baptized into Jesus Christ were baptized into his death?
Galatians 3:27 KJVS
[27] For as many of you as have been baptized into Christ have put on Christ.

The above verses makes it clear that the Apostles baptized in the name of the Lord Jesus Christ. Do you think it possible that these holy and devoute men, who were martyred for the truth of the gospel, so quickly strayed from explicit instructions that our Lord supposedly gave them in Mat 28:19, if in fact our Lord actually spoke those exact words?