Yeah, just start over. But by the screenshot it looks like you are having trouble navigating the 3D viewport more than anything. When you start is hard to get the feel of 3D space. Perhaps consider starting with the Basics course and Fundamentals. Linking you up:
https://cgcookie.com/courses/blender-basics-an-introduction-to-blender-4-x
https://cgcookie.com/courses/fundamentals-of-3d-mesh-modeling-in-blender
