If you've got an android phone, there are various apps that really help with keeping upto scratch. More flashcard type help, rather than learning from scratch though.
JA Sensei is one of them.
My main warning is to avoid learning Roomaji, Which if you're not aware its japanese written phonetically using English characters.
If you're going to learn it, do your best to delve into JAPANESE
Hiragana, Katakana. Kanji(Although avoid this till later as its intense, Even the japanese dont know all Kanji)
I spent nearly 12 months learning, from books(with audio accompaniment) websites, and I watched NHK world a lot! This helped give me a sense of the language, to a basic degree, and allowed me to speak phrases from memory(No fluency). But i have to say my biggest progress was made when I bought a headset and started using Rosetta stone, It works!
And it teaches you properly, no use of english during the lessons. You see visuals, and japanese. Thats it. And you learn it from the ground up.
I cant recommend it enough.