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Where to apply for passport? How long does it take?
Passport processing is fast these days, 1-3 weeks regular service, usually closer to 1 week. If you do not have travel already booked, you can just go to any
Service Canada near you. If you walk in, you should go earlier in the day and will likely need to wait a couple hours. You can also try to make an
appointment, although you might need to refresh often before one in the near future pops up. If you already have travel booked, do the same but bring your proof of travel, and you can get expedited service.
You can also apply by mail, but I don't recommend it because you need to mail your original citizenship certificate with your application, so you will be without the certificate for some time, and if it gets lost sending or receiving, it can take over a year to replace.
How to apply for a passport:
https://www.canada.ca/en/immigration-refugees-citizenship/services/canadian-passports/new-adult-passport.html
And glad to see you received your certificate quickly, congrats!