You can't divorce him immediately. In Canada, you must separate first (live apart for at least one year at different addresses) before you can file for divorce. So if you want to divorce your husband, the first step would be to separate for a full year.
It's difficult for any of us here to really advise you since you are under conditional permanent residency. As I'm sure you know, this means you are supposed to live with your sponsor for two years after you come to Canada in order to keep PR status. Having said that, the current government is talking about doing away with conditional PR. So even if you leave your husband, it's possible nothing may happen and you might get to keep your PR status.