You can simply download precompiled binaries and run to get started immediately. If you want to set up your own Unreal environment then please see these instructions.
Windows: Download the binaries for the environment of your choice from the latest release.
Linux: Binaries for Ubuntu 16.04 LTS is coming soon. For now you will need to build it on Linux yourself.
Most of our users typically use APIs to control the vehicles. However if you can also control vehicles manually. You can drive the car using keyboard, gamepad or steering wheel. To fly drone manually, you will need either XBox controller or a remote control (feel free to contribute keyboard support). Please see remote control setup for more details. Alternatively you can use APIs for programmatic control or use so-called Computer Vision mode to move around in environment using the keyboard.
The AirSim binaries, like CityEnviron, requires a beefy GPU to run smoothly. You can run them in low resolution mode by editing the run.bat file on Windows like this:
start CityEnviron -ResX=640 -ResY=480 -windowed