who last updated a learning plan

Summary

I need to create or modify a report to show who last updated a learning plan

Content

I've tried running the audit trail report for modifying learning plan mappings but it came up blank.  I'm looking for a report that will tell me who was the last person to modify a learning plan. If it could be flexible to other things like courses, enrollments and pages that would be great too.

Also, if the person who created the learning plan could also be added to the report that would be a huge help too.

Thanks for any insight you can provide!