The old movie Jesus Christ Superstar is worth watching, and reveals many of the underlying philosophical ideas, in my opinion ! Of course, it is no kind of "primer" on any of the many current variants of Christianity. https://en.wikipedia.org/wiki/Jesus_Christ_Superstar_(film)
There's a brief outline at http://www.bbc.co.uk/religion/religions/christianity/
More of an academic overview is at https://en.wikipedia.org/wiki/Christianity
I understand what you mean. All of the cultural knowledge of Christianity runs through European and pan-American art (and lots of African art as well).
There is <em>Christianity: A Very Short Introduction. </em>
I will recommend these books too..
Jesus the Christ by J.E Talmage
The lectures on faith(not sure of the author but attributed to J.Smith
Again,you should read your Bible carefully and understand it precisely. Memorize passages that stand out to you as you read and study it.Apply what you learn.Follow the direction the Lord directs you as you study and feel what you are reading.Keep an open heart and open mind .And as you ask Him to build your faith,He will.