Welcome to Fizz and to Canada! You should be fine to ship to a temporary address.
You can change your address later.
Keep this in mind though: You will need to use Credit Card Visa or Mastercard, or Visa Debit to pay for your Fizz plan(s).
Other cards such as Debit Card, American Express (Amex), Dinners... are not accepted as payment methods.
The address and postal code that you associate with your credit card must be the same as the one you declare to your bank, otherwise payment method will be rejected.
You can read more here: https://fizz.ca/en/faq/what-payment-methods-can-i-use