What should I take in university/college to become a police officer?

Im only in grade 9 now, but i really want to become a police officer when i am older. I know that in the region where i am in, (durham region in ontario) you only need your highschool diploma. Although, It would be good to have a higher level of education such as college or university. So I'm just wondering what would be good to take in university or college to become a police officer. Or, should i not take anything and just apply right after high school? I also heard that It will be easier for me to get in because i am a girl, and they need more girls at the moment. Thanks!