Hi there, thank you for your question! This is an interesting and important question and it comes up often. Perhaps you can find some useful information by having a look at some previous threads where people have shared their knowledge here at AskHistorians:

So, what do we actually know about the life, existence, etcetera of the man called Jesus Christ?

How much evidence is there for a historical jesus christ besides the bible?

Here is a page which lists even more questions for you, including those I already gave.