You might consider some reading for your Advent preparation.
If you haven’t yet read Benedict XVI’s third volume of Jesus of Nazareth: The Infancy Narratives, it is a great place to start!
The Holy Father’s book presents a real defense of the historicity of the infancy narratives.
Also, for Advent, you might try something I read two years ago. Try the reflections by a priest who died under the Nazi regime, Fr. Alfred Delp, in the book Advent of the Heart: Seasonal Sermons And Prison Writings 1941-1944. Kindle HERE. UK HERE.