I created and added a registration form to a website I am building with paypal

I cant figure out if it works or not, ..... is there anyway to test before publishing website

I would suggest you you to take a look to this guide that will help you to test your PayPal payment form: https://www.jotform.com/help/390-How-to-Test-Paypal-Payment-Form 

If you have any question, please let us know.