There are many resources online to learn. "West Coast Swing Online", which produced the above tutorial, has a large collection of instructional videos available on YouTube and through their website. They are a great place to start when looking to learn the basics or expand your repertoire.
A focus on what really matters in the structure of all the basic 6-count patterns.
A focus on what really matters in the structure of all the basic 8-count patterns.
Improve your skill at staying grounded for that smooth "gliding" look and feel.
Learn how to establish a clear connection with your partner so clear leads can be both given and received. Get rid of the grip (and leave your thumbs out of it).
Free yourself from focusing on prescribed footwork so you can dance to the music inside of the pattern.
Some demonstration of styling options, and a quick explanation of how to know when "hits" in the music are likely to happen.