I am new to unreal engine, I need help to build a city by importing real world map which I have downloaded

I am new to unreal engine, I need help to build a city by importing real world map which I have downloaded.I have tried using world composition but i can not understand how it works. I am trying to build roads and building.

if your new then i wouldnt start off with world composition as its a bit complex and rather finicky. instead start with just making a regular level and learn to make a landscape then you can move on to things like level streaming and world composition. as for creating landscapes ill post some links to tutorials below. also when creating a new landscape if you have a heightmap select the import from file option.