You should ask the staff at the gym for a recommended program. They should then take you through how all the equipment works.
You can get lots of programs on the web. A lot of the good ones cost you money because they have been developed by professional instructors or body builders who have taken years to work the best programs for the best results.
I subscribed to one and it covers absolutely everything I need for my goals, complete with video demonstrations of how to do each exercise.