Here are a few examples of what you might emulate for your project.
Guerrilla Girls (critical billb0ard activism/art)
Barbara Kruger (photography/graphic design critical of modern society)
Cindy Sherman (photography critical of stereotypes and cultural expectations of females)
You can also use videos to create a commentary that is critical of a public issue: https://youtu.be/G6gkZZeddQU
You might also consider doing an image search for “street art” & “street stickers.”