Help - Trying to set up a wireless printer on a public network [View all]

I am trying to set up a new Canon Pixma printer on the public wifi in my mom's new apartment. The setup instructions with the printer are setting up with a modem.

From my google search about using public wifi:

Method to Connect Canon Wireless Printer
Start with, hit the power button on printer to make it 'ON'. ...
Thereafter, go to the printer 'Home' from the touch screen and then press and Hold 'WiFi' button.
Next, select 'LAN Wireless set up' option> press 'OK'. ...
Choose your WiFi Network (named Canon in your router setting).


I'm stuck.

Help.