Read The Gospels
What Are The Gospels?
The Gospels are four books in the Bible that tell the story of Jesus' life and teaching. They are the original sources of our information about Jesus. It would be worth reading at least one of these.
How Can I Read Them (or Listen To Them)?
Grab a Bible
Make sure you have a modern, understandable translation.
Find the index at the front and look for Matthew, Mark, Luke or John. They are actually the first four books of the New Testament i.e. the last third of the Bible.
The Bible is online in many places. A well-known site is BibleGateway. Here are the four gospels on BibleGateway
More About These Books
But also to watch the Gospels