You might want to consider something like EMI's "The Best Classical Album in the World....Ever". While it is NOT the best classical album ever, it is quite a decent introduction, a dual cd compilation of many different composers, styles, etc...this might be a good way to sample a variety of classical music and help you decide what you like best, what you are willing to explore further. The cd is relatively inexpensive, and I believe there are several versions?
Good luck.
Good luck.