I am new to Shopify and also an absolute beginner when it comes to coding. Actually, I'm quite surprised that I've managed to implement a few things already. But now it seems like my limited programming wisdom has come to an end.
I've added some lines of HTML code to the product template in order to incorporate the four textboxes you can see in the picture below. All of that appears on the product page. The button that says "QR Code Generator" already does the following: It sets off an API module that generates a QR code with certain (static) attributes like Name, Email and mobile number.