Interactive n8n Lesson 1: Data Flow, Execution & Debugging

This workflow is an interactive, step-by-step tutorial designed for developers new to n8n but familiar with programming, JSON, and APIs. It uses Form Trigger and Form nodes as checkpoints, guiding users through real-time execution in their n8n instance. Users build understanding by observing data movement, node behaviors, and outputs directly in the editor, with sticky notes providing explanations.

Key concepts covered include triggers and data flow, single vs. multiple execution modes in Code nodes, patterns like Merge, Split, Aggregate, and Loops, and handling multiple items with batching or Execute Once options. It demonstrates how variables, context, and side effects propagate between nodes, making abstract ideas concrete through live demos.

Benefits include accelerated learning without reading static docs—ideal for self-hosted or cloud n8n users. Use cases: Onboarding teams to n8n, skill-building for API/automation devs, or refreshing core mechanics. Ends with debugging techniques using logs and console output for inspecting inputs/outputs.

Perfect for beginners aiming to master execution flow quickly, saving hours of trial-and-error.