It is recommended that you follow the streamlined onboarding process presented in the OCI console to complete the minimal prerequisites to start using Logging Analytics. See Video: Start Using Logging Analytics.
Refer to the quick start tutorial if you want a quick experience of setting up and using Logging Analytics. See Oracle Cloud Infrastructure Logging Analytics Quick Start Guide ( Tutorial ).
Alternatively, to customize the policies, perform the prerequisite configuration tasks as detailed in this book. See Configure Your Service.
Some of the sub-tasks for configuring are:
If you want to familiarize yourself with Logging Analytics, then use Sample Log Data to perform some of the analysis operations. See Use Sample Log Data to Become Hands-on with Logging Analytics.