How to implement Sungrow dashboard

I found the link in the support pages Home Assistant Community Add-on: iSolarCloud / Sungrow - Share your Projects! - Home Assistant Community

And it looks really exciting. It takes you here

HomeAssistantAddons/GoSungrow at main · MickMake/HomeAssistantAddons

I follow the instructions to install and configure at the bottom of the screen

HomeAssistantAddons/GoSungrow/DOCS.md at main · MickMake/HomeAssistantAddons

Then it says Start it up!

So that only left me with three questions

1/ How do you start it up? (ie Start what up??) Where do you start it up?
2/ How do I then get the dashboard running with the fancy graphs etc?
3/ How can I verify what my MQTT userid and password is?

Thanks in advance for any assistance that can help me get this up and running.
Much appreciated in advance
Ash