Including your card in Apple Pay is straightforward. Add your card from Apple Wallet or through your banking application. Here's the process:
iPhone: Launch Apple Wallet and press the "+" icon
Apple Watch: Launch the Apple Watch application on your iPhone and choose 'Wallet & Apple Pay,' then press 'Include Credit or Debit Card'
iPad: Navigate to Settings, access "Wallet & Apple Pay", and choose "Include Credit or Debit Card"
MacBook Pro: Navigate to System Preferences, choose "Wallet & Apple Pay," then choose "Include Card"