There are a variety of videos and documentation regarding how to use Mathematica beyond just the basic.
Hands-on Start to Mathematica (videos)
Follow along in Mathematica as you watch this multi-part screencast that teaches you the basics—how to create your first notebook, calculations, visualizations, interactive examples, and more.
Hands-on Start to Wolfram Mathematica and Programming with the Wolfram Language (book)
Learn Mathematica at your own pace from authors with 50+ years of combined Mathematica experience—with hands-on examples, end-of-chapter exercises, and authors' tips that introduce you to the breadth of Mathematica with a focus on ease of use.
Provides examples to help you get started with new functionality in Mathematica 10, including machine learning, computational geometry, geographic computation, and device connectivity.
Access step-by-step instructions ranging from how to create animations to basic syntax information.
Search Wolfram's large collection of materials for example calculations or tutorials in your field of interest.