n8n has had one of the more interesting glow ups in the tooling world, going from a respectable open source alternative to Zapier into one of the default ways people are actually building AI agents and LLM automations, and that shift is why it belongs on a list about AI learning at all. The official courses live in the documentation and are split into a Level 1 and Level 2 track that walk you through the fundamentals, how nodes work, how data flows between them, how to handle triggers, logic, and connections to external services. They are free, they are clearly written, and they get you productive quickly, which is exactly what you want from vendor training. The reason this scores as well as it does is simple economics and relevance, because you are paying nothing to learn a skill that has immediate practical payoff, and connecting an LLM to your email, your database, your CRM or a scraper and having it do useful work is one of the most tangible AI skills you can pick up right now.
The AI side is where it gets genuinely exciting, since n8n ships AI agent nodes and LangChain integrations that let you build things that reason and act, not just move data from A to B, and that turns the tool into a real on ramp to agent building for people who would never sit down and write an agent framework from scratch. The honest weakness is that the official course material tends to trail the pace of the AI features, so the structured courses give you the solid base but the freshest agent patterns you will end up learning from the excellent YouTube community, the changelog and the docs rather than the formal curriculum. You also should not kid yourself that visual means effortless, because you still need to understand APIs, JSON, and basic logic to build anything meaningful, and if you self host you are taking on setup and upkeep that trips up beginners. But those are quibbles against a free, genuinely useful, genuinely modern skill.
My advice is to do the official courses to get the mechanics down, then immediately build something you actually need, because n8n rewards learning by doing more than almost anything else here, and the concepts you absorb about chaining, triggers and agents will carry over even if you later move to a different platform.