If you already have a good grasp of Linux and SQL, learning Oracle will be relatively easy for you. Oracle is fundamentally similar to other relational database systems including the SQL Server. Their database architectural principles are pretty much the same. Oracle runs on Linux and UNIX so knowledge of these operating systems is a big help. Once you’ve learned Linux, you can start working on getting your Oracle certifications. Begin with either the 11g or 12c Certified Associate Certifications. While working on your certifications, you can learn more practical skills through Oracle Live SQL, a site where you can practice setting up schemas and writing or running scripts. Also, try to keep updated on the latest courses you can take such as the Oracle Database 19c.