Civilization 5 how to build a city in a beautiful new world

Except Venice, which can't build immigrants, and can only buy polis with Venetian merchants, other civilizations can build new cities by building immigrants (Spain can also build cities with conquerors). The new city can't be built within 4 grids of the existing city (you can see it by opening the hexagonal grid), and there will be hints on the suitable location for building the city. Generally, places where luxury goods, strategic resources or sufficient food can be obtained are suitable for building cities. What don't you understand? Will it not build a city or choose a site? When selecting immigrants, he has a list of options. The first one is to build a city. If it meets the requirements of building a city, it can be built.