Hi @bryan Welcome to FUD!
Instructions are pretty straight forward.
You first need to get a few things:
A transmitter device for your Libre. Although I use a Dexcom CGM , I have heard good things about the Blucon, found here (with instructions)
Don’t bother with the Blucon app, it doesn’t have alarms and is kind of sketchy. Instead download and install xDrip+ on your Android phone. XDrip+ currently only works on Android phones. You can get the latest version here:
https://jamorham.github.io/#xdrip-plus
If you go to the settings(Hardware Data Source) you will find one that will allow reception from the Libre Bluetooth.
Once you get readings on your phone the last step is to force the watch to be the collector. In xDrip+ go to settings> smartwatch features> android wear integration and turn on the first slider. Your readings will now be sent to the SW3. Then go to your watch, choose the xDrip+ watchface and you should see your readings.
Now, to make the watch the collector go back to xDrip+ on the phone and the Android Wear settings page you were just on. Tick the two boxes below the slider and in about five minutes your watch will be the collector.
I would strongly encourage you to fully explore all the xDrip+ settings, they are numerous. The alarm settings are there and much more.
Good luck getting this set up!