Create a Potion site, using your new page as the Notion URL.
Paste the styles in the Snippet Injection > Head.
Create a Stripe account. Go to Payment > Payment Links to create unique URLs that can be used to purchase a product.
Click on Create New and Add a new Product that you would like to sell. Add name, description, price, and One time.
Once a Payment Link is successfully created, you can copy the unique URL generated and paste it as the Buy link on a product page. This will redirect users to the Stripe checkout flow when they click on the button.