Head on over to one of Scott Hahn's many ministries and check out their free online courses. The courses are listed --> HERE. They offer three different tracks of study: Apologetics, Biblical Theology, and Salvation History. They are great classes that Amy and I have used in the past. I especially have enjoyed Reading the Old Testament in the Gospel of Matthew.
After you've looked at those, make sure to check out their whole site. It's loaded with great stuff like audio and links to things you didn't know you wanted to see, but now that you know its there, you have to. Have fun and leeeaaaarrrrnnnn.