Small php mysql database application for my word press site

General information for the website: Raw materials website
Database management system (DBMS): MySQL
Kind of development: Customization of existing website
Description of requirements/features: Word Press/ PHP / MySQL / Web Design skills required...

I have about 40 products I need to display the picture and technical data sheets for on a dedicated page on my Word Press website. If a customer selects a product (from a smaller picture on the product page directly, or any place the product is displayed on the site, or from a scroll down select box, they need to be taken to a dedicated page where all the info (technical data sheet) and photo for that product is displayed in detail, with the option to download the data sheet in pdf or excel/csv format.

I need to be able to input the product detail in the backend, as well as a photo, and also to edit or add products from the backend, and the customers can view/download it from the dedicated page in the frontend.
Extra notes: I already have the site set up, and I use the Divi theme from Elegant themes, which had many modules available built it which can be used to build the specified page inside the Word Press installation. I have all the data and photos ready.