I’m trying to follow the tutorial on the radicale website but am getting stuck in the “addresses” part.
From reading from the link you provided, you have to create a config file on one of two locations if they don't exist:
"Radicale tries to load configuration files from /etc/radicale/config and ~/.config/radicale/config"
after that, add what the Addresses sections says to the file:
[server]
hosts = 0.0.0.0:5232, [::]:5232
And then start/restart Radicale.
You should be able to access from another device with the IP of the Pi and the port after that