Okay, so I get Higarana and Katana, thats it?
Two Japanese alphabets: Hiragana and Katakana.
A third alphabet, where each symbol actually represents an entire concept, not just part of a word: Kanji (these are usually the "more complicated" symbols). *As stated, the iD L doesn't use any kanji characters*
I would start by memorizing the Hiragana, then the Katakana chart; both have different symbols for the same sounds (sort of like lowercase and uppercase, but not exactly the same concept).
See if you can get Japanese From Zero on Amazon. I use a combination of the Genki books and Nakama. But really, you don't need either to start memorizing the alphabets--just a couple of charts and a good pronunciation guide.
I'm sure if you told your parents you're interested in learning Japanese, they might be very willing to help get you started!
...and if you have a torrent utility, you could find a lot of free stuff.....allegedly.
But if you just want to use the iD L and look up some of the stuff that comes up, really just have a chart of the Hiragana and Katakana handy so you can transcribe into Romaji (Japanese words using our Roman alphabet) and look them up in an online Japanese/English dictionary.