@carolb Nice to see you around the community.
Creating new accounts:
Check out this thread for instructions on how to create a new account: How to Create a Pandora Account
Once those accounts are created, those users should then be able to accept the invitations that you emailed to them.
If those users run into any issues accepting their invitations after creating their accounts, please contact our support team directly for further assistance here.
Using multiple Amazon devices:
You can create smart home groups if you have more than one Alexa-enabled device. If you need further assistance, you can reach out to the Amazon support team directly. Hope this helps!
... View more