I would recommend starting with our help documentation: Reports in ArcGIS Pro—ArcGIS Pro | Documentation. When creating the report, it sounds like you will want to use a Basic Summary template: Report templates and styling—ArcGIS Pro | Documentation
If the report's data source is a map layer, you can create charts: Make a chart—ArcGIS Pro | Documentation; then, you can include them in your report: Include a chart frame—ArcGIS Pro | Documentation.
I hope this helps!
Thanks Alycia. The tutorial gets me part of the way there.
I can run a report and display an attribute value(s) for the records in the reports but how would I customize the report to run a custom calculation?
For instance, in the ESRI Tutorial: Tutorial: Create and modify a report—ArcGIS Pro | Documentation , how would a user run the report by displaying Population Difference for each state (Population 2000-Population 1990) for each record.
Please see the attached png.