My very first app, I'm doing well but hit a wall with this issue.
I have SP list "Shipment Periods" with three columns "Description", "StartDate" and "EndDate".
In Powerapps I have "Load1 Datacard" with Drop down for the "Description" and two date pickers for StartDate and EndDate.

How can I get the drop down selection to populate these date pickers? Thank you.