Well, I hear it's legal in Oz, but I'm sure you've got more than enough knowledge in that 27 y/o head of yours to know what to do with a beautiful and willing woman, should the opportunity materialize.
It's just your fear of the unknown, first-person experience that's constantly dragging you down, really. I was the same way, back in my late teens. Constantly agonizing that I was going to do the wrong thing and make my loving partner hate me...
Of course, I'm no Casanova (which is good, 'cause that guy was riddled with syphilis), but only after finding someone that I connected to on a fundamental level, and was comfortable with enough to let loose my inhibitions did it become enjoyable.
Really, just try to keep that lack of experience in the back of your mind. It's not like you're just gonna meet a woman and jump right into the sack... so take your time, observe, engage, learn, and grow comfortable. Your next partner needs to be a 'safe area'... and you'll find her. In New Zealand, though.
Or Taz.