Congratulations on creating your first unity project! There were a lot of steps to reach our starting point for development, but now we can finally start learning some of the intricacies of the Unity engine. With your project successfully started, the Unity screen will probably look something like this:
Let's start familiarizing with the controls of navigating through a Unity Project.
For additional information regarding scene view controls such as Mac controls please refer to the manual documentation found here: Scene View Navigation.
With this sample project created, let's familiarize ourselves with a few more basic concepts. In the left side of the editor under Hierarchy you should see Main Camera, Directional Light, and Global Volume.