I want to add a card to Apple Wallet

Hi simanrio,

Add a new card on your iPhone:

1. In the Wallet app, tap the Add button .
2. Tap Debit or Credit Card.
3. Tap Continue.
4. Follow the steps on the screen to add a new card. If prompted, choose your bank or card issuer from the list or find them using the search bar.
5. Verify your information with your bank or card issuer. They might ask you to provide additional information or to download an app before approving your card for use with Apple Pay.
6. If you have a paired Apple Watch, you have the option to also add the card to your watch.

Here you can find a complete guide Set up Apple Pay - Apple Support

It seems you came from the correct support page. Could you please go into more detail what the problem/issue is?

Please keep in mind not all cards support Apple Pay, please read this support page: If you can't add a card to Apple Wallet to use with Apple Pay - Apple Support.