I want to add my husband to my account

Apple ID accounts are designed to be used by one person. If you want to share selected things with your husband, you can each have your own Apple ID and use Family Sharing. See: https://www.apple.com/family-sharing/

To create a new Apple ID.

Apple ID - create a new.      

Apple ID – Create        

Apple ID - Could Not Create or Could Not Set Up iCloud message.