Before you get working with Single Lens Reflex film cameras you need to know some of the basics. Here are two simple visual guides to help you get familiar with the basic layout.
For those wanting further information on FM10 cameras you can download the manual here
You will need to be able to identify the following components
General Focus Screens
Nikon FM10 Focus screen
Here are a number of tutorials as a reference for remembering principles related to DOF (Depth of Field ) and Exposure.