Get a fast working primer on an unfamiliar topic

I need a working understanding of [TOPIC] in one sitting. My background: [YOUR RELEVANT KNOWLEDGE, E.G. SOFTWARE ENGINEER WITH NO FINANCE BACKGROUND]. My purpose: [WHY YOU NEED THIS, E.G. A VENDOR MEETING ON THURSDAY]. Build the primer in this order. 1) The mental model: explain the core idea in under 150 words, using one concrete analogy suited to my background. 2) The vocabulary: the 8-12 terms I will actually encounter, each defined in one sentence, ordered so that later definitions build on earlier ones. 3) The map: the 3-5 major subtopics and one sentence on how each relates to the others. 4) The misconceptions: the mistakes newcomers typically make when discussing this topic, and what to say instead. 5) The frontier: what practitioners currently disagree about, stated neutrally without taking a side. 6) A self-test: five questions ranging from simple recall to application, with all answers grouped at the end rather than inline. Keep the whole primer readable in about 20 minutes. Match the depth to my stated purpose — I need to follow a conversation and ask sensible questions, not pass an exam. Where something is genuinely contested or uncertain, say so directly rather than smoothing it over.