Need help understanding the full... picture

Hi folks, I know absolutely 0 about creating a web application, but I want to make a simple photo gallery that would be used on a tablet. Something along the lines of- going into a car dealership, having a tablet, and being able to view the car you're looking at in different colors, wheels, etc.

Where would the photos get stored?

• Things I need:
  • Inventory- if I have 5 in the car lot, it can reflect that.
  • Photo storage
  • Customer friendly- I don't want to pull up photos on Google Photos. I'd prefer an in house app
• Things I want:
  • Click rate- how many customers are clicking on a specific color, wheel set, etc

Thanks y'all!