Creating Workflow in ArcGIS Pro?

I have just started with Workflow Manager in ArcGIS Pro, and have created a Workflow Database, in which I can create new jobs.

However, I just see the three sample job templates (data edits, landbase updates and web edits), and was wondering how I can create my own job template / workflow.

Do I still need the old Workflow Manager desktop application, or can I do everything from within Pro?

I read the ‘getting started’ document but that’s about running existing workflows (http://pro.arcgis.com/en/pro-app/help/workflow-manager/get-started-with-workflow-manager.htm)