Just a few titles you might like to read if you want to get an idea what film is all about.
Buckland, W. 1998. Teach Yourself: Film Studies. London: Hodder & Stoughton.
Short, sharp and to the point. A very easy read.
Bordwell, D. & Thompson, K. 1997. Film Art: An Introduction (5th Edition). USA: McGraw-Hill.
Both of the above books offer a detailed introduction to film production, history and interpretation.