You can subscribe to Nest Aware or Nest Aware Plus by going to the Google Store here:
You can also purchase a Nest Aware or Nest Aware Plus subscription through either the Google Nest app or the Google Home app:
I apologize for my late response, and thank you for all of your patience while waiting for a reply. I understand how upsetting this may be, and I'm happy to assist you with this. Here is a great link on how Nest Aware works and how to subscribe. In addition, here is a link on how to manage your subscription. Thanks for your help, MplsCustomer.