ISO on auto? CHEATER!
I've been doing pretty much the same. I've found a few good sites and youtube video series that have taught me quite a bit. A few friends have also helped me along. But yeah, I've found that I've learned the most by simply shooting. I like to take the same picture over and over and change up the settings to see how they affect the outcome.
I haven't bought any major accessories yet, mostly because I want to get comfortable with the kit lens first, and then decide what type of shooting I'll want to do next.
However, I just ordered a Lenspen and a Giottos Rocket Air Blaster:
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