In the focus groups, you’ll want to give them a task. It would be best to give a task that takes down a barrier you’ve found in obtaining or maintaining users. My first thought is adding or moving content, such as a list they need to create and/or a list they have stored somewhere else. As mentioned, that would be my biggest barrier personally. You may benefit from asking the group what barrier they might see in using the app. What would make you not feel naturally inclined to open Twos when you think of something you want to remember? Then, use an example from the group and create the task. If no one answers, ask them to complete a task you pre-selected (creating or moving a list, for example). Watch how they complete the task and allow them to speak freely. Also, let them try to work something out if they have a question. See what happens. You can learn a lot from this. The instructional videos that did so well for us at unation were very short. We worked to make them 30 seconds or less. A few needed to be longer due to the number of steps, but still as short as possible. We also made different variations so someone could choose how to learn - example: How to Create an Event. We showed it in less than 30 seconds and gave the basics only. Then, we made a video showing how deep into the details a user could go when creating an event.