Paypal is an additional payment provider that must be setup with Stripe, Authorize.net, or Uscreen Payments.
PayPal is only available for USD, GBP, Euro, and AUD currencies. In the case of disputes, disputes will be found in favor of the disputer and the chargeback and dispute fee will be applied to your account.
Navigate to Settings > Payment Providers to connect to PayPal. Click on Connect account and enter the email you want us to submit payments to.
You can setup a PayPal account here.