>>3769965pushing and pulling means using a film at the wrong iso. you buy ektar 100, put it in your camera and tell the camera the film is 400 iso, and thats "pushing" 2 stops (100 > 200 > 400)
https://thedarkroom.com/pushing-and-pulling-film/pushing increases grain, i recommended it since you said you wanted something extra grainy. this pic is from a roll of tmax that i pushed from 400 all the way to 3200 as an experiment. not a great photo but you get the point