Steps on this page worked great for me in the MSP airport:

https://www.makeuseof.com/connect-to-wifi-with-nmcli/

In summary:

nmcli
nmcli dev status
nmcli radio wifi
nmcli dev wifi list
sudo nmcli dev wifi connect MSP Airport WiFi [didn\’t work since it interprets the space as a command break]
sudo nmcli dev wifi connect \’MSP Airport WiFi\’

Looks like I previously had installed another networking package (via ethernet), so it might be reliant on that:

sudo apt install glib-networking-common

After I got online with wifi like that, I could use apt to install the Gnome network-manager app:

sudo apt install network-manager-gnome