http://www.nikonchat.com/nikon-camera-noise/

How do you get the film in a Nikon FM?
I have one of those old days, 70 cameras, and I know that to get the movie you have to pull the small lever handle is a way to the back appears, but at the same time I began to hear strange noises start cracking and I'm not sure if I'm doing well! I'd appreciate the help very much.
This http://www.butkus.org/chinon/nikon/nikon_fm/nikon_fm.htm is the instruction manual for the camera.
Guide to Digital Cameras : Digital Camera Noise