Can you recommend a free to enroll rdbms 19c (or higher) course

Summary:

for one of our DBA's who is still working on 11g we need a 19c course

He needs:

ASM

RAC

and admin

Content (required):

on premise - rdbms

Version (include the version you are using, if applicable):

19c

Code Snippet (add any code snippets that support your topic, if applicable):

N/A