Hi DRE1975,
It sounds like you're looking for information about creating a new Apple ID to stop using a shared one. If so, it's best to create a new Apple ID for your wife so you can continue to use the previous Apple ID and keep your information. Once she's created her own Apple ID, she can add you to her Family Sharing where she is the family organizer.
If needed, the article here has steps to create an Apple ID. How to create a new Apple ID
Additionally, the article here and information has details on why you should use different Apple ID's. Make sure that each family member has a unique Apple ID - Apple Support
"Avoid sharing an Apple ID
Apple recommends that you do not share your Apple ID. Instead, set up Family Sharing so that each person uses their own Apple ID. This way, your family can share purchases, subscriptions, and more without sharing personal information like email, text messages, or passwords.
If you share your Apple ID with a family member, certain services will treat you as the same person. You might see these issues:
- Apple Music family subscription: Instead of receiving your own membership with your own library, you’ll share a library and recommendations with the other family member.
- App Store, Apple Books, and iTunes purchases: If Family Sharing is ever stopped, the owner of the shared Apple ID will keep all purchases. You might lose access to everything in the account, including purchases you initiated.
- Apple Podcasts, Apple Books: Podcast episodes and bookmarks might sync according to the other family member’s preferences or be accidentally deleted.
- Messages: You might receive text messages that are intended for your family member.
- Fitness: You might see Health details, Workouts, and Fitness+ recommendations intended for your family member."
There are also steps for creating an Apple ID and setting up Family Sharing in the same article shared. If needed, the direct link to start and setup Family Sharing is here: Set up Family Sharing - Apple Support
Cheers.