Hi there DogdocProfessor,
We see you are asking about using your wife's Apple Music subscription since you now have your own Apple ID, but aren't able to see content. She may need to go in and make sure her subscription to Apple Music is shared. Have her walk through these steps: Add a family member to your shared subscriptions
She may need to set up a Family Share first.
If you haven't set up Family Sharing
1. Open the Settings app.
2. Tap your name, then tap Family Sharing.
3. Tap Set Up Your Family, then follow the onscreen instructions and invite your family members. Already set up Family Sharing?
4. Eligible subscriptions are automatically shared with your family members.
Learn how to use a Mac to set up Family Sharing
All the best.