Jesus Christ is the Son of God.
He was conceived in the womb of Mary by the power of God’s Holy Spirit.
He existed before his birth only in the plan and purpose of God.
The doctrine of the trinity is a false doctrine invented in the fourth century AD.
It has no support in the Bible
May I suggest that you read: One God or a Trinity? here:
If you then have further questions please ask.
I hope you find this helpful.