Hi gititsh
Welcome to the Apple Community,
where some of us do the best we can to help each other troubleshoot.
Your Apple ID is the one account you use to access all Apple services,
such as the App Store, Apple Music, iCloud, iMessage, FaceTime and more.
It seems Apple requires a valid payment method in your Apple ID account,
for the first time you use the App Store, or iTunes, even if you only download free apps.
Apple support have articles online (links below) to help.
First:
Check the payment methods that you can use with your Apple ID:
(Scroll down to find your country or region)
https://support.apple.com/en-us/HT202631
Then: How to create your Apple ID if you do not have one::
https://support.apple.com/en-au/HT204316/
Now you can:
Change, Add or Remove Apple ID Payment methods
https://support.apple.com/en-us/HT201266
After you have used the App Store or iTunes for the first time,
you can remove the payment method if you wish:
_____________________________________________________
More, if needed:
Apple ID Log-in:
https://appleid.apple.com/
If you can’t download or update apps on your iPhone or iPad:
https://support.apple.com/en-us/HT207165
If your payment method is declined in the App Store or iTunes Store:
https://support.apple.com/en-us/HT203005
If you can't remove your last payment method or use no payment method with your Apple ID
https://support.apple.com/en-au/HT203905
Hope this helps :)