Hi engy68,
Welcome to the Apple Community.
Re: Why doesn’t it let me use my Apple balance
Your Apple ID is the account that you use to access all Apple services
and make all of your devices work together seamlessly. After you log in,
you can use the App Store, iCloud, iMessage, Apple Music, Apple TV+ and more.
Your Apple ID balance can generally be used for purchases from Apple, although some purchases may require a credit-card on file, even if paid with Apple ID Balance.
Apple support have articles online that may be helpful:
Eg: See what payment methods Apple can accept in your country or region:
Payment methods that you can use with your Apple ID - Apple Support
and
What you can buy with your Apple Gift Card or Apple Account balance – Apple Support
Or
How to: Add money to your Apple Account balance - Apple Support
If needed: How to add an Apple ID payment method:
Add a payment method to your Apple ID - Apple Support
__________________________________________________________
Re: it won’t let me it use my Apple Cash / 11 dollars down the drab any tips
Send and receive money with Apple Cash – Apple Support
Says: Use Apple Cash to send and receive money with people you know.
Add money to Apple Cash - Apple Support
says: "How to view your balance:
Also: If you want, you can:
Transfer money in Apple Cash to your bank account or debit card
____________________________________________________________
More support, if needed:
App Store - Official Apple Support
or
Apple Cash Support
or
Apple ID — Official Apple Support
All the best :-)