Want to learn 日本語？
Here, go in order...
1. Learn the kana (hiragana/katakana) from Wikipedia. Just study these for the first weeks until you can pretty much tell the difference between ぴ and ぬ. Pretty much, study everyday the stroke order, what they look like, and how to say them. Do 5-20 a day. Depending on how much time you have but I don't recommenced anymore. You don't need to waste money on a book for learning the kana, it really is easy...
2. Get Remembering the Kanji Part 1. Complete this book. It should take 3-9 months depending on if you do 5 a day or 20 a day..etc...
3. Learn 10,000 sentences. Either from music, anime, books, whatever. Make sure these sentences are accurate. This way so you are learning the grammar and the pronunciations for the kanji you learned in Remembering the Kanji.
These 3 steps should take you 1-2 years so get to it and get the fuck off 4chan. Go here which is where I got all of my information:
http://www.alljapaneseallthetime.com/blog/all-japanese-all-the-time-ajatt-how-to-learn-japanese-on-your-own-having-fun-and-to-fluency