A Nest Aware subscription applies to all of the cameras in a Google Nest "home".
You can subscribe here: https://store.google.com/us/product/nest_aware?hl=en-US
You may also be able to do so within the Google Home app by going to Settings | Nest Aware.
See these help topics on Nest Aware:
Manage your Nest Aware subscription on the Google Store:
What you get with a Nest Aware subscription:
Nest Aware basics:
I just wanted to jump in real fast to see if you saw MplsCustomer's reply and to see if you still needed some help on this or if you were able to get it sorted out. If you are still needing some help, just let us know and we'll be happy to continue helping.
Thanks for the help here, MplsCustomer.