You should be clear about becoming a lawyer and the goals you wish to achieve.
To pursue a career in law, you should choose your undergraduate program carefully. You cannot do this that you take the courses of marketing and then apply for a law program. You should include appropriate law course in your undergraduate program that could help you in continuing the law studies in future. During this time, you need to flourish your skills for writing and reasoning as these are considered the most vital elements of a lawyer. Always remember that, by doing all this, it will be comparatively easier for you to convince the law school admission officers that you have the spark and necessary skills that are required to become a lawyer.
After you are done with your undergraduate degree, prepare yourself for the Law School Admission Test (LSAT). Not to mention, with an unacceptable score in the LSAT, you will find it real hard to take admission in the law school of your choice. Keep in mind the minimum score requirement, set by various law schools which you wish to go to.
You should meet all the requirements of a law school, primarily by joining the Canada law School.
Keep working hard and prepare hard for the Canadian Bar Exam as you need to pass this.
After you pass your test, you should file in the documents with a Canadian province of your choice from where you intend to attain your license and commence your career.