Problems adding integration - Insteon

I am new to HA. Just installed Hass.IO 2.12 on my Raspberry PI 3.
At this point I would like to add my Insteon devices, but the integration is not part of the default add-ons. I searched and found that there are bunch of additional integrations, but I can’t seem to get it installed.
I believe that I need to add a new Repository URL, but nothing that I put in works.
The Insteon Integration is listed in the page for Home Advisor, so I figure it is supported. When I go there (https://www.home-assistant.io/components/insteon/) it describes the integration, but doesn’t give the URL that I need to add it. I tried the git link (https://github.com/home-assistant/home-assistant/tree/dev/homeassistant/components/insteon), but it and none of the pieces of this URL seem to add as repositories. Each piece ends up saying in the log that it can’t find the repository.

How can I find the repository URL that will let me add the Insteon Integration?

Looks like you just need to edit the configuration.yaml file and configure your Insteon modem as described in the docs. There is no repository or anything to install, maybe you are thinking of Hass.io add-ons? Not all integrations support installation from the UI.

The Advanced Configuration section of the Hass.io docs explain how to edit the configuration.yaml file, if you’ve never done so.

It sounds like you are trying to make it much more difficult than it actually is.

It’s literally 4 lines (a couple more if you use any options) in the configuration.yaml.

Thank you all for the quick pointers.
Pointing out that there are some that go through the gui and some that don’t it a big help. I have used Openhab for years, which has some of the same quirks. So far I have been pleased with what I see here, and look forward to learning more.