I don't know if you are a complete beginner John, but assuming you are a newbie, from the opening splash screen choose "Beginner Lessons". Click on the yellow "Start Here" link.

This will take you through Fundamentals 1 and F2 giving you some good basics. From there you are pretty much self directed. There are more advanced lessons and genres availble as well as techinical skills. Once you have some knowledge you will probably have more questions. The forum is a good place to look for answers and there is also the search engine which will really open the site up. Something else you should be familiar with is the Toolbox. Look for it on the left side of your screen. Lots of good stuff in here like chord and scale tools as well as jam tracks to practice with. And forgot to mention the songs. You can filter songs from Absolute Beginner through to Advanced. Lots of good stuff in here as well.

Good luck.