How do I activate my cash apple

Hi Lilllypetite :)

Welcome to the Apple Community,

where some of us do our best to help each other troubleshoot.

Wondering which device, or Mac, you are using.

Apple support have articles online that may be able to guide you:

Set up and use Apple Cash on iPhone (U.S. only)

https://support.apple.com/en-au/guide/iphone/iph385cf0980/ios

Manage your Apple Cash account

https://support.apple.com/en-us/HT207883

Transfer money in Apple Cash to your bank account or debit card

https://support.apple.com/en-us/HT207882

Also:

You can look under "Wallet" app for lots more info.

in the Online iPhone User Guide.

(Click "Table of Contents" > Apps > Wallet)

https://support.apple.com/en-au/guide/iphone/welcome/ios

Hope this will work for you on your device :)