First, I reached out to YouTube, as seeing someone create code from a complete zero helped me figure out exactly which parts I missed out on during my study. As it turned out, I got some inspirations, which came in quite handy since the final format of the gallery was not specified. I considered a wide range of options, from slideshows to a lightbox gallery. In the end, I decided to go with the first one, which initially seemed a bit easier to create.
The second source of wisdom was online content in the form of websites – presenting lines of code that other programmers used to create their own photo galleries. Their tricks were very helpful and aided me in figuring out how to make my own gallery more interactive.