Freedom of religion means that no one else can tell you what your religious beliefs must be. It also means you don’t get to tell anyone else what theirs must be.
So, you think comparative religion classes are a waste of time ?
Listen.
If you are actually sincere about exploring these issues, having an open mind and understanding of history will allow you to break on through to another side.
You can start with either:
http://www.amazon.com/Mere-Christianity-C-S-Lewis/dp/0060652926
best of luck to you.