Intro to Theology

As I am studying for one of my finals in an introduction to theology class it came to my attention that most often we have no idea the actual theology that we believe. We are raised in childrens church with such a surface level theology. There is so much I would have never known or understood. My brother goes to a secular state University, and he had an introduction to theology class as well. He was taught the same things. It was so fun to debate him, but then I realized I needed to ask myself the question: is it worth paying so much more money for a "Christian" education when I could take theology classes at a state Univeristy, saving about 10 grand a year??