That's an excellent question and it's commendable you are searching!
Here's are just a couple of my notes. To sum the main points: Yes! The Bible, along with ancient Bible manuscripts, along with extra-Biblical sources including not only non-Christian writers but even anti-Christian writers, in addition to archeology prove beyond a shadow of doubt Jesus is real.
No serious scholar even dares to question Jesus' existence. (Strongly recommend you check out jw.org)
"No, it was not by following artfully contrived false stories that we acquainted you with the power and presence of our Lord Jesus Christ, but it was by having become eyewitnesses of his magnificence." - 2 Peter 1:16
THE 27 BOOKS OF THE "NEW TESTAMENT" ALONE PROVIDES DOCUMENTATION FROM 8 INDIVIDUALS LIVING IN THE FIRST CENTURY TO JESUS CHRIST.
The Bible provides outstanding evidence, that Jesus Christ was a real person. First, the Bible speaks of Christ Jesus as real and historical and, describes much of his life in great detail. There are eight different authorize writers who were inspired to record and preserve information now contained in the Bible. These people were contemporaries of Christ Jesus himself. One of these eight individuals investigated Jesus' life and interviewed eyewitnesses (Luke 1:1-4). At least, five knew Jesus personally, some were close relatives e.g., two were his younger half-brothers and three of the writers were of Jesus chosen "12 apostles" he selected. The details in their writings testify to their First Century origin. Additionally, some of the OLDEST of these MANUSCRIPTS were dated by some scholar to CIRCA 25-50 years after they were to originally penned. These different writers provided differing glimpses into the life and teachings of Jesus Christ. That alone speaks volumes on the validity or historicity of Jesus Christ, Our Lord. – (SEE: GREENLEAF'S TESTIMONY)
"Dismissing Christian testimony for the historicity of Jesus is like dismissing Roman testimony for the historicity of Caesar" – Unattributed
“MEN OF ISRAEL, HEAR THESE WORDS: JESUS THE NAZARENE WAS A MAN PUBLICLY SHOWN TO YOU BY GOD THROUGH POWERFUL WORKS AND WONDERS AND SIGNS THAT GOD DID THROUGH HIM IN YOUR MIDST, JUST AS YOU YOURSELVES KNOW.” – ACTS 2:22
After the destruction of the temple in Jerusalem by the Romans in 70 C.E. many of the non-Christian eyewitnesses of Christ Jesus died; numerous records, some possibly even referring to Jesus, were no doubt lost and destroyed. Following that a large-scale genocide where many of the Jews were slaughtered occurred.
However, even still glimpses that attest to the historicity of Christ Jesus still emerge from outside of Bible.
FOOD FOR THOUGHT: would it be logical for these writers to depicted an individual they supposedly made up? Why would do so? and why would they include elements like his baptism, washing the feet of his disciples, enduring a humiliating execution on a torture stake?
The Early Christian disciples not only just acknowledged Jesus but actively proclaimed Christ Jesus' teaching, life, death and resurrection and doing that knowing so it was most likely lead to their death sentence. Additionally, early Christians did not participate in warfare (unlike Islam) therefore governments hated them, the Roman emperors and orthodox Jewish leaders both hated them. So what convinced them? Something to think about.
– YOSEF BEN MATITYAHU – "FLAVIUS JOSEPHUS" – A LEVITE PRIEST AND A JEWISH HISTORIAN. JOSEPHUS' WRITINGS ACKNOWLEDGE BOTH THE EXISTENCE OF JESUS AND JESUS' RELATIVE JOHN THE BAPTIST. SEE: THE “TESTIMONIUM FLAVIANUM” (FIRST CENTURY JEW)
– GAIUS SUETONIUS TRANQUILLUS – A ROMAN HISTORIAN.
– LUCIAN OF SAMOSATA. LUCIAN WAS AN ANTI-CHRISTIAN GREEK SATIRIST
– MARA BAR-SERAPION CIRCA 73 C.E. ("KING OF THE JEWS") – Disclaimer: It is unconfirmed if this as reference to Jesus or someone else.''
– TALMUDIC LITERATURE: "The late Bruce Metzger of Princeton, has commented upon this appellation: The defamatory account of his birth ms to reflect a knowledge of the Christian tradition that Jesus was the son of the virgin Mary, the Greek word for virgin, parthenos, being distorted into the name Pandera (1965, 76). The Talmud also refers to Jesus’ miracles as “magic,” and records that he claimed to be God. It further mentions his execution on the eve of the Passover. Jewish testimony thus supports the New Testament position on the historical existence of Jesus."
Virtually all historical references are after the fact nor before, yet when has ever stopped historians before. We accept kings, emperors etc are real never questioning their existence sometimes with one mention centuries after they died, but God is in wisdom used prophecy too.
CHRIST JESUS FULFILLS THE DESCRIPTION OF FORETOLD MESSIAH.
– Direct male descendant of Shem, Abraham, Isaac, Jacob/Israel.-- Genesis 9:26-27; 12:3, 17; 21:12
– Born of the tribe of Judah. - Genesis 49:10 – Luke 3:23-33
– Direct male descendant from King David. – Isaiah 9:7 – Matthew 1:1, 6-17
– Born of a virgin – Isaiah 7:14; Matthew 1:18-25
– Declared by Jehovah to be his Son. – Psalm 2:7; Matthew 3:17
– A prophet – Deuteronomy 18:15
– Not believed in – Isaiah 53:1 – John 12:37, 38
– Zealous for Jehovah's house – Psalm 69:9 – Luke 2:49
– Entered Jerusalem riding an ***. – Zechariah 9:9; Matthew 21:1-9
– Betrayed by a close associate. – Psalm 41:9 – John 13:18, 21-30
– Betrayed for 30 silver pieces. – Zechariah 11:12 – Matthew 26:14-16
– Assaulted – Isaiah 50:6; Micah 5:1– Mark 14:65; 15:19
– False witnesses testify against him – Psalm 35:11; Matthew 26:59; Mark 14:56
– Silent before his accusers.– Isaiah 53:7; Matthew 27:11-14
– Lots cast for his garments. – Psalm 22:18; Matthew 27:35
– Reviled – Psalm 22:7, 8 – Matthew 27:39-43
– Poisonous plant and vinegar given – Psalm 69:21– Matthew 27:34, 48
– None of his bones broken. – Exodus 12:46; Psalm 34:20; John 19:33, 36
-- Buried with the rich – Isaiah 53:5, 8, 9 – Matthew 27:57-60
– Raised - Resurrected - Does not corruption – Psalm 16:10 – Acts 2:24, 27; 13:35
– Exalted to God’s right hand – Psalm 110:1 – Acts 7:56
Sincerely hope this helps. Feel free to inbox me if you have more questions.