You will need to have access to a film camera. Most people still have one laying around, but they can be picked up on eBay, Goodwill, or even the drug store for not much money. I still use an old Canon AE-1 Program, and it gives me excellent results. Don't worry about all the fancy bells and whistles; just find one that works. If your camera has an automatic mode like mine, just let the camera do the work. Some older cameras do not do the auto metering, so you will need to handle that yourself. The basic rule of thumb is the "Sunny 16"
rule. This simply means that you should use one, over whatever speed your film is, as the shutter speed, and an aperture of f/16 on a sunny day outside. For example, on a sunny day, I choose to shoot with 250 speed film. My exposure will be for 1/250 with an aperture of f/16. Unfortunately, a more detailed explanation of manual camera operation is beyond the scope of this Instructable. For more information, I find this website
to be an excellent resource (be sure to read all of the articles; there are nine.)