Don't worry about not knowing much about politics and culture... I lived in Denmark for a year without knowing the language, without a TV, etc, and I didn't knew almost anything about this kind of stuff in Denmark. Now I live in the UK and I can barely recognize a few politicians and even fewer British, um, "stars".
After all, it's up to you - if you don't care who's the prime minister or if you don't care about soccer players, or whatever that's cool. Everybody has different interests.
Plus, I find the fact that you've been to Koprivshtitsa (its really hard to write this one in English, heh), Melnik, Veliko Tarnovo, etc more important. You actually learned more about Bulgarian culture this way compared to what you'd learn if you read the magazines or watch tv or whatever.