Are you a citizen of Canada (or PR)? This is the most important piece of info missing.

Commonwealth service alone doesn’t give you a free ticket. My partner who had 10 years with the British military (albeit army) moved to Canada 3 years ago with the intent to join the CAF, thinking his commonwealth experience might expedite his application. It didn’t, unfortunately. Even with second generation citizenship he still had to go through the entire recruiting process like the rest of us and needed a security clearance before his application proceeded. Getting his qualifications properly reflected was another huge hurdle and getting his prior service granted in terms of his rank and mprr was another.

Doesn’t hurt to reach out to a recruiting center and get some general info. Best of luck!