Virtual Cards are active by default, meaning you can use them immediately after you create them.
Your physical Wise Card should arrive in the mail within a week of your account being opened. After you receive your card in the mail, follow these steps to activate it:
Navigate to the Cards tab
Select your physical Wise Card (the black card)
Hit Activate Card
Follow the instructions to supply the necessary card information
It'll be active and ready for use immediately
Note that you can freeze your card if you ever need to, and can modify your label and controls at any time.