If you just want to try general insurance, then i'd recommend studying the Fundamentals to start off. In order to be an insurance broker the minimum is to have an level 1 license. Long term if you want to do insurance as your career and sell commercial/personal/life insurance, then you may want to pursue to get an CAIB designation.
CAIB info:
Professional Development - Insurance Brokers Association of Canada
Fundamentals :
IBABC - Exams & Results