Thanks for that Nekojita. I read this thread, and couldn't think of a polite way to express it.
It's great to set lofty goals, like reading fluently, but the notion of "learn Japanese now" seems so much like "get rich quick." It's possible, but really unlikely.
I'm relatively fluent (I understand 80% of what I hear daily, and 70% of what I read). Even still, manga is a major hassle. The kanji is out of ordinary; military/police/medical stuff comes up, and I rush off to a dictionary. But even the spoken stuff/hiragana can be difficult. Dialects, slang, and onomatopoeia are all well out of the normal daily experience of a non-native speaker.
I also learned the same thing a long time back, trying to use American comics to teach Japanese kids. The number of times I had to stop and explain that something was a phonetic spelling of something else, or that a trendy phrase was used was too much, and I just stopped.