Some questions from a new developer

I want to rebuild the airport of my hometown.But I still dont know how to do it.For example, I dont know which app can download the latest map for the develop, I dont know if there are other tools for building the airport except MSFS SDK, I dont know how to design the buildings of the airport, maybe by 3d max or blender?
I hope I can get the answers soon!

What about multi stage tutorial covering your needs?

The Msfs project editor is quite good for any purpose, but you can look also for Airport Design Editor (ADE) if you are looking for a tool that runs out of the sim!

Thanks for your sharing!