What are the qualifications for being in the CPD?

I want to be a police officer and l want to know what are the qualifications.
I want to prepare myself for the future.
I was thinking about joining the military, does it look better
if you were in the military trying to look for a job?
What should l study for?
How long are you in the police academy?
What are the qualifications to joining the police academy?
How do you get promoted to detective?