Hello Babebotts,
When you see "This Apple ID has not yet been used in the iTunes or App Store" it usually means that you haven't added the necessary information to complete a purchase. Let's make sure everything you need to do has been completed.
Before you can use a new or updated Apple ID, Apple will send you a verification email to make sure that the email address belongs to you. You'll need to verify your email address you can learn more here: About your Apple ID email addresses - Apple Support
To make purchases (including free apps) from the App Store and use subscriptions like iCloud+ and Apple Music, you need at least one payment method on file. You can learn how to add a payment method here: Add a payment method to your Apple ID - Apple Support
You may find these steps helpful:
Add a payment method on your iPhone or iPad
1. Open the Settings app.
2. Tap your name.
3. Tap Media & Purchases, then tap View Account. You might be asked to sign in with your Apple ID.
4. Tap Manage Payments.
5. Tap Add Payment Method.
6. Enter the payment method details, then tap Done.
Thanks.