If you are new to LiveCycle ES and want to understand LC ES you can start by reading the document LiveCycle ES Overview.
http://help.adobe.com/en_US/livecycle/es/overview.pdfThis document provides information on how you can use LC ES for designing business processes, creating forms etc. It also provides information on installing, configuring and administrating LC ES.
Next you will want to read Installing your Development Environment page 7-11.
http://help.adobe.com/en_US/livecycle/es/install_dev_enviro.pdfThis document provides information on LC Workbench ES.
Be sure to read Process Concepts under the LiveCycle Workbench ES Help. This should help get you started.