Matters not what Wikipedia or Google tells you, to join the CF you need to be a Canadian Citizen. A buddy of mine (OBD where are you?) had an offer from the CF to transfer directly from the RAF but still had to wait for his Citizenship to be approved.
I suggest you start applying now.
Edited to say: Sorry, I've just seen your age and now realise I have come across as a grumpy old s*d intent on crushing your dreams. My apologies. If you are set on it, perhaps studying for a degree in Oz or Canada might be a step towards citizenship? Best of luck.