You did not come to Mexico City for one postcard moment. You came because cities like this make you adjust your walking speed before you understand why. Locals move with the patience of people who have argued with this weather, these stairs, this traffic, and won often enough to stay kind. If you are learning Mexico from footage, stop hunting a billboard hero. Hunt habits: how doors open, how horns negotiate, what gets sold from carts at which hour.
Neighborhood compass (no mysticism)
Start by refusing the idea that Mexico City is only its famous postcard strip. The useful city hides in the second ring: where apartment buzzers look tired, where laundry performs its honest theater, where a bakery sells something you cannot translate but can absolutely eat. Reward yourself with one tourist thing, then commit to one block nobody framed for you.
In Mexico City, 'authentic' is usually just 'paid attention to.' Listen for languages stacked in one family. Watch how parks are used at dusk. Notice whether stray cats are fed like colleagues.
Order like a regular (even when you are not)
Food is often the fastest honesty check. Skip questions that sound like a quiz show; ask what the kitchen wants to cook today. Tipping, queues, and table-turn expectations differ; copy the person ahead of you like a student, not a spy.
When World Guesser drops you on a clip from Mexico City, borrow this: identify water, identify faith architecture, identify script, then let vegetation correct your ego. Mexico City will forgive a wrong first guess if your second guess listens better.