I think this thread will help you out in terms of online material. My advice is to start off slow, learn Hiragana then Katakana, learn the pronunciation well, some simple phrases, words etc. If you can continue that for at least 3 months, then maybe you should consider getting into the serious stuff like textbooks/classes.
Japanese is not for everyone, even if you love anime to death the same would not likely be true for the language and getting to a level where you can understand anime without subtitles will take a very long time. Its hard, it takes work and it takes dedication, keep those in mind.