How do I open InDesign from Creative Cloud?
You don't use InDesign to OPEN InDesign. You use the Creative Cloud to DOWNLOAD and INSTALL InDesign.
Are you a Creative Cloud member? Have you downloaded InDesign? Which version? Which computer platform are you running?
See subject also hete:
Also, if you're confused about the way the Creative Cloud works, there's some help here:
Retrieving data ...