The film and camera you choose to make your photographs are one of the fundamental decisions you have to make. Unlike a digital image, a film image is far less mutable, especially a Polaroid.
With other film emulsions, you can change a lot at the stage of processing the film. But to alter the contrast of a black-and-white film, or tweak the colors printing from a negative is an art in itself. Much more so with a Polaroid.
It is essential getting as much of the picture “right” in-camera —exposure, focus, and so on— for this, you must choose the right film to start with. On the other hand, the unpredictability of Polaroid is a joy in itself and attracts many people. The immediacy is part of the attraction.