First off, congratulations on graduating!
Regarding your questions, I think the first thing you should do is calculate your GPA according to the following: Percentages (if possible, some schools have conversion tables on their application pages), L20, L60, with relevant drops (the number of drops also varies by school), and B20/B60. You'll know where you stand, GPA-wise, with all the schools in Canada and can have a better idea of what your chances are that way.
Regardless of your GPA, you should focus all of your energy on studying for your LSAT. I disagree with the idea that extracurriculars and volunteering are important enough to offset a weak GPA/LSAT. Your numbers are the most important thing on your profile, and everything else is extra. The LSAT forum on this website has great threads discussing study schedules and tools to score as high as possible. I would also consider writing the December LSAT if you are not feeling confident about September, just as a safety measure. If you're interested in a school like U of A, for example, they average your LSAT scores and a very low score can damage your chances of admission.
Your ECs seem fine as they are, and anecdotally, I have friends who have gotten into multiple law schools in Ontario and B.C. with much less on their resumes. I don't think you should worry too much about your ECs/volunteering, and just focus on getting your numbers in order so you can focus on where you want to apply.