Hope you find the resources helpful!
A comprehensive list of all technical guides (SQL, Backup and Recovery, etc.) is available at Oracle Books. Workshop Outlines and Specialized Guides Hope you find the resources helpful
The PDF version is especially popular because it includes: Backup and Recovery
While there aren't many free resources available that offer the complete Oracle Database 19c Administration Workshop student guide in PDF format, I was able to find a few options: Hope you find the resources helpful