Trying to make multiple buttons to bring up modals with images

Essentially, right now I'm trying to make a portfolio, so I'm trying to make a section that shows my art in it. I found one way to do that, and that's to make a button that brings up a modal with said image at full size in it. The issue is I need multiple of these, and I'm trying to figure out how to make individual buttons use the same code for bring up a modal with the image in question. Reason being is that rewriting the same kind of code for multiple buttons (A lot of them) seems extremely inefficient and bloated so I'm trying to figure out a good way to do this, but as someone who's not well versed in javascript I'm struggling and looking for help. Anyone got any ideas? Here is my code so far, and the site. Don't mind the content being all over the place, this is just a test site for figuring things out before I make the actual site.