I wouldn't necessarily follow this information.You have not committed any criminal offence buddy . Don’t feel bad about what has happended.
There would have been some genuine reason for your stay being extended.
Aus immigration officers would have put a permanent Ban for you if you had done something really bad .
It’s only a temporary ban to a specific visa for AUS only.
Just go ahead with the processing for Canada . Be confident and justify the reason for your extended stay if questioned .
All the best