Depends where you want to start. I say start with the basics.
Google basic japanese lessons and you should find some interesting stuff.
Also start learning the writing system as soon as you can. Start with Hiragana and then move onto katakana, finally kanji (the most fun out of them all).
Most of all you must have patience. You won't learn this over night.
Oh and good luck
.
Try to make some japanese friends. They will be sure to help you.
For me right at the moment, I learn but book (colloquial Japanese), by audio course (pimsluers Japanese), from my girlfriend and by going to Japanese lessons once a week.
Hope this helps