I have a form, which has an amount and item detail values to pass to PayPal.
I have installed the Commerce Paypal module, but I don't find any clue on how to integrate it so that when the form is submitted, it should go to PayPal for transaction. On success, it should redirect to the success URL; likewise, it should happen on failure, where the users are redirected to the failure URL. I haven't installed the Drupal Commerce module as there is no use of pages like catalogs and checkout in this system.
How can I use the Commerce Paypal module?