Hi, not discouraging new answers here, but fyi you can get started in our FAQ section Did Jesus Exist?
How much evidence is there for a historical jesus christ besides the bible? and What's the best evidence that Jesus did or did not historically exist? by /u/talondearg
Is Tacitus the main reason historians accept Jesus's historicity? by /u/jasoncaspian
Is the Bible/religious texts considered a reliable source for historians? by /u/kookingpot