As an aspiring Interaction Designer, I went through the same confusions that you are going through. You want to know everything about it but dont know where to look. In the beginning you find loads of information, but after a point there is nothing new. To make it easier for you, here is a collection of some really good links that I have found on my journey so far. Hope it is helpful.
What is Interaction Design?
Confused between Interaction Design and Human Computer Interaction?
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