The concept of the Trinity is not easy to understand, but that does not make it invalid.
Jesus is God's son -- but He is also God (as is the Holy Spirit). John 10:30, "The Father and I are one."
Jesus was also, temporarily, fully human. He came to earth to establish God's kingdom, then gave His life in sacrifice to pay the required penalty for sin. Then He returned to heaven and regained His divinity.
BTW, you quote John 1:3 -- All things were made through Him, and without Him nothing was made that was made -- but apparently forget Genesis 1:1, "In the beginning God created the heavens and the earth." (New King James Bible). So if God created the heavens and the earth (everything) and John wrote that "all things were made through Him [Jesus] and without Him nothing was made that was made", then clearly Jesus is God.
A poor analogy of Jesus' status as a human: the Secretary of State has the full power and authority of the United States. S/he may not be President, but still represents the United States in dealing with other nations.
Why do you put faith in a word that is not found in the Bible, "Trinity"?
Why are you defending a word that is not in the Bible?
Is it explained by Jesus 3 are one one God? No! Jesus says God is one. -Mark 12:29
Does Jesus ever say he is equal to his Father? No! Jesus says differently. -John 5:19, 30, 8:28, 14:28
Jesus is called God's Son over 50 times in the Bible.
Jesus is called God's one and only son at John 3:16
Jesus is called God's only begotten son at John 1:14
After Jesus is raised from the dead, God is still his Father. John 20:17
In heaven Jesus is at God's right hand. Mark 16:19, Romans 8:34, 1 Peter 3:22, Acts 7:55-56
After Jesus ascended to heaven, what is recorded in the Bible about Jesus?
Col 1:3; Eph 1:17; 1 Cor 11:3; Heb 9:24; 1 Tim 2:5; 1 Cor 8:6; Rev 1:1
Since Jesus doesn't use the words that define the word Trinity, why are we even talking about this subject?