Use buy now or add to cart buttons for a new page

Hi, I have a landing page where a user inputs a quantity of goods that they would like to buy. I would the button to confirm the quantity of goods to take them to a new page with an overview of the details of the product for purchase. My product includes multiple things in the receipt so a pop up is not going to work for us.

How do I do this with the Buy Now or Add to Cart buttons?


Here is my site Read-Only: LINK
(how to share your site Read-Only link)