This course goes from an empty map to one people actually play and save progress in: terrain and unit placement, classic triggers, EUD and EPScript, save/load, and compiling and testing.
One thing sets it apart: it assumes you will be working with an AI. But there is a hard line between what a model can do for you and what it cannot, and knowing where that line sits is the most practical thing here.
Work through it in order. Skipping the trigger modules to get to the AI one leaves you unable to judge whether what comes back is correct.