I really want to learn Japanese, but my high school/university doesn’t offer it. What can I do?
Go online to one of the college textbooks sites and order yourself a Japanese textbook there. From there, it just depends on how dedicated you are at it. Japanese is not an easy language to learn, at it WILL frustrate the hell out of you sometimes. But it can be done, if you’re willing to work at it.
I don’t have any specific book recommendations, as I wasn’t particularly fond of any of my textbooks. I will say though that for kanji, the Kodansha Kanji Learners is probably one of, if not the best resources you could buy.
As for media, Japanese TV shows like variety (if you can stomach it) and drama are good. But not anime so much. The Japanese used in anime is not natural (intentionally so) and all you’ll learn are terribly unuseful phrases anyway.
And of course, stay far away from Japanese porn. Forget the language, it will darken your soul. You have been warned.