b-pleb,
I'll share my story, since it's similar to yours, and what's helped me as a self-learner.
I was about 2/3 done with my seminary education when I discovered the world of classics as a scholarly discipline. Fortunately in seminary I learned a lot about Greek and Hebrew, so I was able to learn Latin on my own before I graduated. After graduating, I set aside further theological studies to pursue this new passion on my own. I'm married and have four small kids, and I have a pretty good job as a military chaplain, so I can't afford to become a starving student all over again to study classics formally. I'll have to wait until I retire and put my kids through college to jump back into school to pursue this incredible interest.
So over the past several years this is what I've done to learn as much as possible without the benefit of a classics faculty to mentor me:
- Attended some professional meetings (APA, CAMWS, ACCS)
- Joined a Great Books community book club which met at a local bookstore
- Listened to iTunesU as you have
- Read everything I could get my hands on (original sources, commentaries, grammars, lexicons, archeology, biographies, etc.)
- Studied Clyde Pharr's Homeric Greek and the Wheelock's Latin series
- Purchased a gazillion grammars and dictionaries (you can often find great deals at used book stores)
- Taken up some studies in Sanskrit and German
- Visited several university bookstores and graduate advisors to ask questions about admissions and graduation requirements (UCSB, UCLA, KU, UC-Boulder, Mizzou, TTU, Georgia, Vanderbilt, St John's - Santa Fe). Some have even allowed me to visit their classes.
- Exegeted and translated from original languages
- Started homeschooling my children through the trivium. In fact, I'll be teaching my 6-year old son about the Iliad soon, and he'll be my buddy to have fun with discussing classical literature and teaching him Latin.
Every advisor I've spoken to has told me the same thing about self-learnig and preparation for a grad program: read everything you can about the classical world. Thus, while I wait to apply, if God wills, I've designed my own self-study program after typical MA & PhD programs. And this should keep me quite busy with fun stuff for the next 10-15 years, and it helps me to cope with being disconnected from a community of classics students and professors.
Good luck!