You got it all wrong. Drop that DS game, it's the biggest pile of crap ever.
1.
www.smart.fm go get yourself some vocab.
2. Genki, Japanese for busy people, minna na nihongo... anything.
3. Japanese langauge partner. Try
www.japan-guide.com (classifieds, friends, select your city) or
www.sharedtalk.com
4. Once you can make sentences, get Japanese on your computer (Global IME) and the get your arse over to
www.lang-8.com and write you some diaries.
5. Tofugu.com is also a good resource. You can try his online lessons, but I've not tried them personally so can't comment, but he's a good guy and his Japanese is ace.