Quebec has some of the strongest legal protections against retaliation for union organizing in the country!
We have something called card check, meaning once a majority of workers have signed union cards, you can get certified immediately without a long delay. Signing a card is completely private; your boss has no way to know who signed!
https://www.legisquebec.gouv.qc.ca/en/document/cs/C-27?langCont=fr#se:36