The ‘trinity’ is a false doctrine adopted in the fourth century AD as the Church slid into apostasy.
It cannot be explained because it makes no sense.
It has no support in the Bible.
It is foisted on the gullible as an incomprehensible ‘mystery’ because no logical explanation can be given.
So the Father is God, the Son is God, and the Holy Spirit is God;
And yet they are not three Gods, but one God.
So likewise the Father is Lord, the Son Lord, and the Holy Spirit Lord;
And yet they are not three Lords but one Lord.
The whole thing is contradictory nonsense.
A genuine case of ‘the emperor’s new clothes’.
In the Bible there is one God who created all things.
Isaiah 45:5 I am the LORD, and there is none else, there is no God beside me:
Isaiah 45:18 For thus saith the LORD that created the heavens; God himself that formed the earth and made it; he hath established it, he created it not in vain, he formed it to be inhabited: I am the LORD; and there is none else.
The Holy Spirit is the power by which God created and sustains all things.
Job 33:4 The Spirit of God hath made me, and the breath of the Almighty hath given me life.
Jesus Christ is a man, fathered by God by his Spirit acting upon Mary.
Luke 1:35 And the angel answered and said unto her, The Holy Spirit shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.
The Holy Spirit = the power of the Highest (God).
Jesus cannot be God because he is a man who mediates between God and men.
1 Timothy 2:5 For there is one God, and one mediator between God and men, the man Christ Jesus;
He existed prior to his birth only in the plan of God who knows the end from the beginning.
1 Peter 1:20 ASV who was foreknown indeed before the foundation of the world, but was manifested at the end of times for your sake,
Jesus was foreknown in exactly the same way as all those who will be in the kingdom of God.
Romans 8:29 For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren.
Beginning his preaching at Pentecost, Peter still refers to Jesus as a man even after his resurrection and ascension to heaven.
Acts 2:22 Ye men of Israel, hear these words; Jesus of Nazareth, a man approved of God among you by miracles and wonders and signs, which God did by him in the midst of you, as ye yourselves also know:
If Jesus is God, Peter misses an ideal opportunity to say so.
May I suggest that you read Jesus: God the Son or Son of God? (click title)
I hope you find this helpful.