Oracle University has a wealth of free webcasts for Oracle E-Business Suite. If you’re looking for an overview of how to secure an EBS environment running in Oracle Cloud, see:
Elke Phelps, Senior Principal Product Manager, provides an overview of Oracle E-Business Suite secure configuration guidelines and security features available when deploying Oracle E-Business Suite in Oracle Cloud. Knowledge of Oracle’s Cloud Services, including IaaS and PaaS, is assumed. This material was presenterd at Oracle OpenWorld 2016.