Open the official website of Coinbase Pro and sign in to your account. If you are using the smartphone app, then open it on your smartphone. Select the "Buy/Sell" tab on the upper-right side. Click the "Buy" panel to select the crypto you want to buy. Input the "Amount" that you would like to buy denominated in your local currency. Select the methods of your payment. Click the "Preview Buy" button to confirm your purchase. If you wish to make any updates, click the "Back Arrow" button. After reviewing the details, click the "Buy" button to complete your purchase.