If you want to process a credit card directly you will need to sign up for a Braintree account. PayPal Pro would work, too, but it has a monthly fee and Braintree does not. Braintree is PayPal owned, of course. The Braintree drop-in UI would actually replace most of the fields you see here. It would include credit card, venmo, PayPal, and even Google/Apple Pay if you have it enabled.
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