Doc: Make it clear that the integration needs to be installed.

Before the Add Integration step will work, you need to install the integration.
This is a bit of a misleading choice of wording in the HA UI.

Issue #391

README.md

@@ -67,9 +67,9 @@ If you submit a pull request, please understand that the config file naming and
 
 [![hacs_badge](https://img.shields.io/badge/HACS-Custom-orange.svg?style=for-the-badge)](https://github.com/hacs/integration)
 
-Installation is via the [Home Assistant Community Store
+Installation is easiest via the [Home Assistant Community Store
 (HACS)](https://hacs.xyz/), which is the best place to get third-party
-integrations for Home Assistant. Once you have HACS set up, simply click the button below or 
+integrations for Home Assistant. Once you have HACS set up, simply click the button below (requires My Homeassistant configured) or 
 follow the [instructions for adding a custom
 repository](https://hacs.xyz/docs/faq/custom_repositories) and then
 the integration will be available to install like any other.
@@ -78,7 +78,7 @@ the integration will be available to install like any other.
 
 ## Configuration
 
-You can easily configure your devices using the Integrations configuration UI.
+After installing, you can easily configure your devices using the Integrations configuration UI.  Go to Settings / Devices & Services and press the Add Integration button, or click the shortcut button below (requires My Homeassistant configured).
 
 [![Add Integration to your Home Assistant
 instance.](https://my.home-assistant.io/badges/config_flow_start.svg)](https://my.home-assistant.io/redirect/config_flow_start/?domain=tuya_local)