Guidance needed, integration into HA

[Paddy-van-CH]

Apologies for asking basic questions.
I've been googling and trying for the last 2 days, but how do I now get the HA dashboard integrated? Where and how do I need to reference the index.yaml provided?
The ESP32 is connected up and communicating with MQTT. How can I now setup this up as device in HA? Sorry, I'm lost and are going in circles with my google searches.
Help would be very much appreciated.

[panosnl]

I had the same issues. Eventually I solved it, see #22