Hi mindisin,
welcome to this Apple (user-to-user) Community! Congratulations on the new MacBook Pro!
Re: "App Store: window appears saying "This Apple account has not been used in the AppStore before."
Seems Apple requires we have a payment method listed in the Apple Account for the first time we use the AppStore etc.
See what payment methods Apple can accept in your country or region:
Payment methods that you can use with your Apple Account - Apple Support
How to Add an Apple Account Payment method:
Add a payment method to your Apple Account - Apple Support
You may need to allow 24 hours for updates to come into effect.
or
Restarting your Mac (Click black Apple on left in top menu > Restart .... wait while Mac restarts,
and then log back in .... may help to update / view recent changes.
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Re: " I created an Apple account for the first time. "
Check you are signed in (to your Mac) with the correct details you will use for Apple Account / App Store:
(After you sign in, you can use the App Store, iCloud, iMessage, Apple Music, Apple TV+, and more. )
See how to: Sign in to your Apple Account on the web or in your device settings - Apple Support
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Re: "App Store: address data: in "City code", and the phone number digits are activated in "Phone number",
but this data is not accepted for me, .. these fields light up in red letters and say "Fill in the "City code" field" and "Fill in the "Phone number" field"
If still needed, or still not working for you:
You can also access and edit your Apple Account details on the web:
Manage your Apple Account by signing in on the Apple Account website.
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More info / support /contact options :
Apple Account Support Website: or Billing and Subscriptions support website:
Apple Account - Official Apple Support Subscriptions and Billing - Official Apple Support
All the best :-)
