Hi,
I cant find Perform Analysis button. I do this tutorial:
https://learn.arcgis.com/en/projects/track-crime-patterns-to-aid-law-enforcement/arcgis-online/
Check under this headline:
Create drive-time areas around stations
With your login to ArcGIS Online, are you a Publisher or Administrator role in an ArcGIS organization. If not, then the "Perform Analysis" button is not enabled.