Welcome Luke! Studying Buddhisms various traditions is a good idea, but practicing is the essence of Buddhism. If you are truly interested in Buddhism I would recommend visiting various centres and practicing with the people there. See which one "clicks" with you and run with it. In Sydney you will find plenty of "ethnic" Buddhist temples, temples that cater to the practice needs of specific ethnic groups (this may make practice difficult as everything will be conducted in a language that you may not be familiar with), and lots of less ethnically oriented groups. Don't be put off, your previous karma may allow you to feel right at home in an ethnic temple too!
With the eye of wisdom we discover a lot of anger in us, any amount of jealousy, resentment, ignorance, desire - mountains of emotion whose existence we would never have suspected in ourselves... We recognize that most of the faults we perceive in others are only the mirror of our own negativity, the reflection of our own disturbed feelings... At the same time, we relieve the world around us of the burden of our own negative judgements."
Gendun Rinpoche Heart Advice from a Mahamudra Master