It seems it can't be explained or properly understood...
The RCC invented the term "trinity" and they can't explain it. They call it a mystery. So any of these attempts by humans to explain it 2000 years later are simply feeble.
No one really understand's it. Few dare to admit it
It seems that the Protestants did not protest enough for they held unto the trinity.
When the Bible says one God it means one God.
There is one God who is a Holy Spirit which the Spirit moved in creation, and Jesus was conceived by the Spirit, and the Spirit dwells in the saints, and Father is a title, and the Son is the man Christ Jesus.
The Bible says there is only one God the Father who is above all, and through all, and in you all, for He is an omnipresent Spirit.
Jesus is God for He is God manifest in the flesh, and He is from everlasting, and He dwells in the light which no person can approach unto, and no person has see Jesus and no person will ever see Jesus because He is an invisible Spirit but He showed us a visible manifestation of Himself.
And He cannot be a created God for God said there was no God formed before Him and there will be no God formed after Him.
Also there is no such thing as a created God for God means supreme being and a created God would be made of physical matter which is inferior to God's substance as a Spirit, and even the angels are made of physical matter although they are considered spiritual for God made nothing with His Spirit substance.
But this throws people off how Jesus can be God for how can God fit in a human body when He is an omnipresent Spirit.
When the Bible says that God was manifest in the flesh it means that He manifest all His attributes to the man Christ Jesus for He is the fulness of the Godhead bodily, and it pleased the Father that in Him all fulness should dwell, and He has the Spirit without measure.
And the Spirit in Christ is still connected to the omnipresent Spirit of God for God cannot be separated.
Which the man Christ Jesus does not have His own personal Spirit that moves around with Him for there cannot be a double portion of the Spirit in one place and an empty space where the Spirit is not at but Jesus moves through the Spirit and wherever He is at the Spirit is there.
The same as the saints that they walk through the Spirit.
The Spirit does not have to move for the Spirit is already there.
Which makes it easy to understand how Jesus can be God when He is showing a visible manifestation of Himself.
Jesus is like the saints according to being in the flesh except He is the fulness of the Godhead bodily where the saints have partial attributes.
The Bible says that the Son was made according to the flesh of the seed of David, and when the time was come God sent forth His Son made of a woman, made under the law.
The Son is the man Christ Jesus and there is no God the Son, which the Son is the personal human body of God which He laid down His life for the saints and purchased the Church with His own blood.
And God reconciled the world unto Himself in the person of Jesus Christ, God and man in harmony, and everyone that has the Spirit working in their life after being saved is God and person in harmony.
That is why they cannot understand it and say it is a mystery for there is only one God the Father and no trinity.
Jesus is the Father according to Him being God for there is only one God the Father, and He is the Son according to His humanity like a person has the Spirit but they are human.
That is why Jesus said if you have seen Him then you have seen the Father, and the words that He speaks are not His own, but the Father that dwells in Him He does the works.
Jesus is the visible relationship to the saints forever for the man Christ Jesus has a glorified body the same as the saints will have a glorified body which is why the man Christ Jesus prayed to the Father for the saints to have the same glory as Him and behold His glory which is the saints receiving eternal life and a glorified body like the man Christ Jesus, and seeing Him on the throne in heaven which is the throne of God and the Lamb, God in the glorified body of the man Christ Jesus.
They do not understand what right hand means for the only person we will see in heaven is Jesus.