Using input_select with mqtt

Configuration
1

I’m new to hass (and python!!).
I want a select box to send values to my mqtt client, and to set the select box based on input from the mqtt client.
This is my select box:

  input_select:
    ow_status:
        name: "Hus status"
        options:
            - Ledigt
            - I brug
            - Manuel
        icon: mdi:home-outline

I have not been able to find any examples for triggers and actions to get/send to mqtt client.
Please help
Erik