Happy with academic stats but ECs seem weak

To start I'm currently at U of Toronto so while I'm american I don't have any in state benefits anywhere. Also, I'm having difficulty gauging my ECs. I understand I should be competetive for mid-tiers but I was curious about chances at a top 20. I got my MCAT scores back recently and was pretty shocked.

Here are my stats:

MCAT: 523
GPA: 3.94
Race/Ethnicity: Pakistani-American
Clinical: About 100 hours volunteering with another 80 hours paid (all were heavily...

Happy with academic stats but ECs seem weak