The Unity Basics Tutorial
Start by reading through the Unity Basics tutorial.
The Unity Basics covers the basic camera controls and how to create and manage projects.
Here are some bare essentials to practice first:
 Essential keyboard and mouse controls
 The scene view panel
Your view of the world inside each scene takes place in the Scene panel.
Orbit camera around focus: Alt-Left click-drag
 Focus on an object. Double-click Hierarchy items or select and hit F in scene view
Every time you work with an object, it is quickest to focus on it so you can rotate around it and zoom in and out.
 Minimizing and maximize scene view - SHIFT ENTER
This is very useful when there are so many panels taking up space in the interface.
Every time you go to actually use the scene view, it is useful to hit SHIFT-ENTER while navigating through it and SHIFT-ENTER again to restore the rest of the interface.