[Tangram]

It depends on what is going to me most useful to you. I'm mostly interested in communicating through the internet, and don't plan on going to Japan for quite a few years. So reading and writing matters most to me. I am working on my listening and speaking because I don't want to get hit with it all at once, but most of my dedicated study time is reading and writing.

Hiragana is the basic kana, what you'll see most often. Katakana is used for foreign-based words and sound words. As for kanji, they're used whenever they work, if that makes sense. Or rather, the kana are used when there's not a kanji that works.

It sounds like you've poured a good bit of money into materials already. You may regret that. It's really better to start with a minimum, and then buy more as you need it. Not only will you waste less money, but you're more likely to use your materials if you attain them out of need, rather than, "Oh, this looks good."