Server Express is a powerful development environment for creating COBOL applications for a variety of UNIX environments. It is quick to learn and easy to use. You'll need some essentials to get going rapidly and become expert.
See the chapter New Features in your Migration Guide for the major changes in this version.
Read the Welcome chapter in your Getting Started. If you don't have the paper book, click the link to view it online. The Welcome chapter is only a few pages long.
There are a number of tutorials to get you acquainted with different aspects of Server Express. The tutorials are designed to be worked through in order and they each take between 10 and 30 minutes to complete. See the topic Tutorials and Demonstrations for more information.