Imo, there is no way to fail at canvassing. If you show up, walk around, knock on some doors, talk to some folks, then you've had more political impact than 99% of people.
re: LRT I am so doorknocking-pilled it's crazy. I used to grudgingly put up with it but I think it's important/fun now. you might not think it if you know me but I have social anxiety in many situations but - canvassing, whether it's electoral, labor, or tenant, is basically free exposure therapy