How to create a Data Guard Broker Configuration in Oracle 19c

 Here an article from my colleague Fernando:

https://rootfan.com/data-guard-broker-configuration-oracle-19c/#more-1677

And just another useful one, in a virtualized environment:

https://oracledbwr.com/step-by-step-guide-to-install-oracle-19c-rac-installation-using-virtualbox/