Also, I'm taking sociology and media studies what is the difference between the types of postmodernism
In a nutshell, media has become so hyperrealistic that it's hard to distinguish between what is real and what is fake or simulated. The best example case (and the main industry this applies to) is video games, as some scenes look so realistic that viewers may mistake it for in-real-life footage, also helped with the interactive nature of the media.
As for representation, postmodernism says that the media images seem more real than the actual reality the media is trying to represent/simulate. For this reason, postmodernism says that media no longer holds up a mirror to reality, but rather is seen to be the only reality we have.
My teacher swore by Mrs Fisher so I'd recommend having a look at these two videos: https://www.youtube.com/watch?v=1glttxEEVuI
And this page might be the different types of postmodernism that you were on about. Media Studies (I think) focuses on mediatization, consumer society (for entertainment/escapism in media, particularly gaming, and advertising), and simulation: https://cla.purdue.edu/academic/engl...modernity.html
Postmodernism is a bit of a weird one for me to understand too, as I only really know it as "the boundaries between real and simulation are blurred".