You should prepare an interview protocal with your target audience
in mind. The interview protocal will outline information such as your
research goals, interview questions, and…
Some combination of leveraging transcription tools, partnering with
a note taker, and reflecting on your session after it is concluded can
ensure you have useful notes to use later
Asking strategic follow up questions and leveraging a well developed
interview protocol can help you get more information without losing
track of your conversational thread
Whether or not you have enough data depends on factors like your
available time and resources, how likely you are to iterate on this
topic, and how useful the insights you have gathered already are to
you
