Once you have Standard Measures in place you need to Prepare for tracking this creates Tracking measures that hold a relationship to the Initiatives and the time-series performance data. See Standard or Tracking Measures.
These are easy to create
Go to Prepare for tracking on the Benefits Hub
Select ‘Yes’ to “I want to also add timeseries values:”
Select the Initiative(s), then the Standard Measure or Measures >CREATE
Select the Tracking Measures to add time-series data to >NEXT
Select the Frequency and Start/End Dates
Add any number into the Forecast >CREATE >EXIT