Buy Canadian

Sounds like you've basically got yourself covered. Beyond that, I'd recommend just trying to make sure your current methods are sustainable (IE, you won't have to switch back in a year) and trying to find ways to help others.

Some other ways the can help reduce US influence off the top of my head, ordered roughly from least to most difficult:

• Do your research and vote
• Use networked platforms (like the Fediverse) more, to help them compete with big american tech
• Promote Canadian or non-US alternatives
• put together detailed resources to help others boycott US products (IE, blog posts about how you addressed specific issues or infographics explaining the alternatives to common american products.)
• Join local groups to become more connected with your community
• Volunteering
• Becoming involved in politics, be it helping campaign for important causes or running yourself.

Yes, a lot of these aren't directly targeting the US, but the stronger Canada is, the less power the US has over us.