Act as a senior data engineer with 5+ years of experience in graph databases. Your task is to create a beginner-friendly tutorial explaining the core concepts of graph databases using Neo4j. Cover the following topics: [NODES AND RELATIONSHIPS], [CYPHER QUERY LANGUAGE], and [REAL-WORLD USE CASES]. Provide clear examples, analogies, and best practices for structuring data in a graph format. Tailor the tutorial for [AUDIENCE LEVEL] and include [HANDS-ON EXERCISES] to reinforce learning. Ensure the content is engaging and avoids unnecessary jargon.