@VANAMAS16755149I would be to start with the Pega Academy training on Pega Robotics. The System Architect Mission is a great start as this course has examples where you interrogate a web application and build an automation. The Excel connector is pretty straight-forward once you have the basics of building automations. If you are using the latest 22.1 version, we do ship with example projects you can open that demonstrate various techniques and automations you might need.

C:\Program Files (x86)\Pegasystems\Pega Robot Studio v22\Extra Resources\Sample automation projects

Here is a link to the documentation on the Excel Connector. It is in 22.1, however this will translate to 19.1 as well.

https://docs.pega.com/bundle/robotic-automation-221/page/robotic-automation/properties-methods-events/excelconnector.html