How to get started for addon development?

I would like to develop my own addon (https://developers.home-assistant.io/docs/add-ons/tutorial).

I have homeassistant/home-assistant running with access to the docker socket on Mac. I cannot map smb://homeassistant.local as suggested and I don’t have an Hass.io > Supervisor panel.

What am I doing wrong- did I start the wrong docker image?

Thanks!