Hi, Ivan. After you click on the Acoustic button, on the next page near the top there is a little drop down you can filter out the level of difficulty you want. Lisa McC is the person you should probably check with for more specific info. Her forum is down in the Full Access section.

Here's the one she has stickied, which summarizes the lessons and might get you started:

http://www.guitartricks.com/forum/showthread.php?t=28291

Good luck!