I am not a IT specialist or cybersecurity user however some resources that might be useful to you:

https://cloud.google.com/security?hl=en

https://www.googlecloudcommunity.com/gc/Community-Blog/Google-Cloud-Security-Community-Welcomes-Security-Command-Center/ba-p/683192

https://www.googlecloudcommunity.com/gc/SCC-Forum/Getting-Started-with-Security-Command-Center-Your-quickstart/m-p/536689#M16

So some extra tools one can use include both Chronicle and Mandiant (if I am reading this platform correctly as well).

But I should ask are you talking about your organization as a whole (so are the admin or IT personnel) or are you a Workspace end user that is wondering how to better guard individual account?