In the past, we have hosted online classes to teach and learn about the imp app. If you click through this link, you can see a recording of one of those classes: imp 101 class
We discuss the basics: from the home screen through the more nuanced settings like the Do Not Disturb and Allow All Calls features, Answering vs Screening mode, details about list view and more. This is great for anyone who is a visual learner, or new to imp.