There are many studies on the trinity such as this one:
From the beginning of creation in Genesis to the end of times in Revelation, God refers to Himself as "us" or "our" and thus describes the doctrine of the Trinity. The word trinity comes from "tri" meaning three and "unity" meaning one. God is three distinct individuals - God the Father, the Son Jesus, and the Holy Spirit - in one true God. The below Bible verses and Scriptures about the trinity will help you have a better understanding of who God is. It can be a difficult concept to grasp, yet we can believe God's word and know that while His ways are higher than ours, we can trust in Him!
Genesis 1:1-2
1 In the beginning God created the heavens and the earth. 2 Now the earth was formless and empty, darkness was over the surface of the deep, and the Spirit of God was hovering over the waters.
Genesis 3:22
And the LORD God said, "The man has now become like one of us, knowing good and evil. He must not be allowed to reach out his hand and take also from the tree of life and eat, and live forever."
Isaiah 9:6
6 For to us a child is born, to us a son is given, and the government will be on his shoulders. And he will be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace.
Isaiah 44:6
6 “This is what the LORD says— Israel’s King and Redeemer, the LORD Almighty: I am the first and I am the last; apart from me there is no God.
1 Corinthians 8:6
6 yet for us there is but one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live.
2 Corinthians 3:17
17 Now the Lord is the Spirit, and where the Spirit of the Lord is, there is freedom.
2 Corinthians 13:14
14 May the grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with you all.
Colossians 2:9
9 For in Christ all the fullness of the Deity lives in bodily form,
John 1:14
14 The Word became flesh and made his dwelling among us. We have seen his glory, the glory of the one and only Son, who came from the Father, full of grace and truth.
John 10:30
30 I and the Father are one.”
Luke 1:35
35 The angel answered, “The Holy Spirit will come on you, and the power of the Most High will overshadow you. So the holy one to be born will be called the Son of God.
Matthew 1:23
23 “The virgin will conceive and give birth to a son, and they will call him Immanuel” (which means “God with us”).
Matthew 28:19
19 Therefore go and make disciples of all nations, baptizing them in the name of the Father and of the Son and of the Holy Spirit,
Matthew 3:16-17
16 As soon as Jesus was baptized, he went up out of the water. At that moment heaven was opened, and he saw the Spirit of God descending like a dove and alighting on him. 17 And a voice from heaven said, “This is my Son, whom I love; with him I am well pleased.”
John 14:16-17
16 And I will ask the Father, and he will give you another advocate to help you and be with you forever— 17 the Spirit of truth. The world cannot accept him, because it neither sees him nor knows him. But you know him, for he lives with you and will be in you.
Romans 14:17-18
17 For the kingdom of God is not a matter of eating and drinking, but of righteousness, peace and joy in the Holy Spirit, 18 because anyone who serves Christ in this way is pleasing to God and receives human approval.
Luke 3:21-22
21 When all the people were being baptized, Jesus was baptized too. And as he was praying, heaven was opened 22 and the Holy Spirit descended on him in bodily form like a dove. And a voice came from heaven: “You are my Son, whom I love; with you I am well pleased.”
1 John 5:7-8
7 For there are three that testify: 8 the Spirit, the water and the blood; and the three are in agreement.
1 Peter 1:1-2
1 Peter, an apostle of Jesus Christ, To God’s elect, exiles scattered throughout the provinces of Pontus, Galatia, Cappadocia, Asia and Bithynia, 2 who have been chosen according to the foreknowledge of God the Father, through the sanctifying work of the Spirit, to be obedient to Jesus Christ and sprinkled with his blood: Grace and peace be yours in abundance.
2 Corinthians 1:21-22
21 Now it is God who makes both us and you stand firm in Christ. He anointed us, 22 set his seal of ownership on us, and put his Spirit in our hearts as a deposit, guaranteeing what is to come.
1 Corinthians 12:4-6
4 There are different kinds of gifts, but the same Spirit distributes them. 5 There are different kinds of service, but the same Lord. 6 There are different kinds of working, but in all of them and in everyone it is the same God at work.
Ephesians 4:4-6
4 There is one body and one Spirit, just as you were called to one hope when you were called; 5 one Lord, one faith, one baptism; 6 one God and Father of all, who is over all and through all and in all.
Colossians 1:15-17
15 The Son is the image of the invisible God, the firstborn over all creation. 16 For in him all things were created: things in heaven and on earth, visible and invisible, whether thrones or powers or rulers or authorities; all things have been created through him and for him. 17 He is before all things, and in him all things hold together.
John 14:9-11
9 Jesus answered: “Don’t you know me, Philip, even after I have been among you such a long time? Anyone who has seen me has seen the Father. How can you say, ‘Show us the Father’? 10 Don’t you believe that I am in the Father, and that the Father is in me? The words I say to you I do not speak on my own authority. Rather, it is the Father, living in me, who is doing his work. 11 Believe me when I say that I am in the Father and the Father is in me; or at least believe on the evidence of the works themselves.
Philippians 2:5-8
5 In your relationships with one another, have the same mindset as Christ Jesus: 6 Who, being in very nature God, did not consider equality with God something to be used to his own advantage; 7 rather, he made himself nothing by taking the very nature of a servant, being made in human likeness. 8 And being found in appearance as a man, he humbled himself by becoming obedient to death— even death on a cross!
John 10:30-36
30 I and the Father are one.” 31 Again his Jewish opponents picked up stones to stone him, 32 but Jesus said to them, “I have shown you many good works from the Father. For which of these do you stone me?” 33 “We are not stoning you for any good work,” they replied, “but for blasphemy, because you, a mere man, claim to be God.” 34 Jesus answered them, “Is it not written in your Law, ‘I have said you are “gods” ’? 35 If he called them ‘gods,’ to whom the word of God came—and Scripture cannot be set aside— 36 what about the one whom the Father set apart as his very own and sent into the world? Why then do you accuse me of blasphemy because I said, ‘I am God’s Son’?
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