Open the Getting To Know the EE Tutorial document.
The Getting to Know the EE Tutorial (this document) provides a mutli-page self-guided gentle introduction to the topics you need to start using the EE.
The Welcome document is intended as a quick-start version for those who prefer to dive right in.
The Users Guide includes more detailed explanations of each topic in the Tutorial.
The Samples folder contains sample files that can be opened using the EE.
Type Alt Shift H, T to open the EE Tutorial document.