exploratory testing

My team is currently testing a new feature that is still on the concept phase within our app for farmers. We are trying to have an exploratory test instead of a task oriented usability test and I am struggling with the idea of how open ended the test should be.

The reason for the test to be open ended is that I would like to understand what path a user will take after taking a picture of his sick crop instead of asking him to select a dealer where he can buy pesticides(the new feature. Has anyone experience with this kind of testing and ideas how is the best manner to phrase an open task? Thank you