You ask about a sample beginners presentation. Why not attend the one being given this Sunday, nearby to you (relatively), by the JGSLI, in Plainview. It is called: Jewish Genealogy 101: Four Hours+ to Your Family Roots
See the attached flyer.
The location is
45 Manetto Hill Road
I am a member of several JGS's and had attended the workshop several years ago, for the same reason as you. I found it quite comprehensive. If you need a ride there contact me offline.