How do I add my card to the wallet?

Check to see if the Wallet supports credit cards in your country→Countries and regions that support Apple Pay - Apple Support

If your region is supported tap the “+” near the top of the screen and follow these instructions→Set up Apple Pay - Apple Support

Launch the Wallet app and tap "+" button in the top right corner and follow the instructions.

Hello.

What card are you talking about?

Hmmm. This is weird.

Can I ask you where are you from?