Genre photography plan

After having a look at many different genres I have finally decided that I am going to look at documentary photography in greater detail. I have many influences from photographers from Bill Brandt and Martin Parr to Brassai, Sebastiao Salgado and Dorethea Lange.
This specific genre of photography has a wide scope almost anything can be documented. I have decided to document Doncaster's market as it is local to me and also used to be a place thriving with activity. Ten to fifteen years ago people would travel from neighbouring towns just to visit the market and it is one of the things Doncaster is famous for. With the current economic climate and an increase in supermarkets, the trade is becoming harder to survive in.

I am hoping to capture this in some of my images and also get some candied shots of the everyday people that work on the stalls.
I have specifically purchased a Diana F+camera and several rolls of xp2 400 film. I have not shot using film for about 6 years and have only shot using 35mm. I have never used xp2 film before, so thought that this would be a good challenge and ideal opportunity to test a different format. I have also purchased a fisheye lens for and hope that I will be able to create some interesting shots.
As I mentioned before I am shooting at the marketplace. I want to give the impression that these shots were taken sometime ago, giving them a retro feel like that from the 60's era. I am hoping that when the film is developed it will produce some imperfections in the colour, as this sometimes happens when using C41 chemicals to process black and white film. Again this will help to ensure that the images look dated.