Contacts application not working

Create a new admin account in users and groups Change Users & Groups settings on Mac - Apple Support and configure contacts accounts Add contacts from iCloud, Google and more to Contacts on Mac - Apple Support

Follow the steps in the article Create and change lists in Contacts on Mac - Apple Support

Add contacts to a list

1. In the Contacts app  on your Mac, select one or more contacts listed in the sidebar.
2. There’s no limit to the number of contacts you can add to a list. If you use more than one account in Contacts, make sure the contacts you select are in the same account.
3. Drag the selected contacts to a list in the sidebar.
4. If the contacts aren’t added to the list, check if it’s a Smart List — you can’t add contacts to a Smart List.

If you use an Exchange account in Contacts, those contacts can belong to only one folder at a time. Any contacts that aren’t in a folder you create are in the default Exchange Contacts folder.

Note : either the first user account or contacts application is corrupted .