Hey! I’m also a US-Canadian dual citizen! You’re American (not international) and will be considered as such for admissions purposes so you honestly have nothing to worry about. I was born in the US and went to a Canadian university and it has probably made me a better applicant.
I’m currently in the 2020/2021 admissions cycle and have had success so far. Also, you can apply to schools with stats above yours!!! I actually have an interview coming up to Wisconsin med (UWSMPH) and also a top 5 MD school, and my stats were below there averages. Don’t be discouraged. Just put together a well