Getting Started with Azure/O365 Auditing

Read this:

https://cloudblogs.microsoft.com/industry-blog/en-gb/government/2021/04/14/updated-office-365-security-and-compliance-guidance-for-the-uk-public-sector/

Create your own audit based on MS500 and AZ500 training guide primary topics.

https://www.skylinesacademy.com/resources

Expand on your audit by learning each security feature in depth and adding tips/references to your audit sheet.

Good luck!