Yes. You can skip ahead by doing the following:

Mac/PC
1. Open the Table Of Contents with the "<<" button in the top left corner
2. Right or CTRL Click any lesson and select "Unlock Lesson"
3. A "Go" button will appear. Click it to launch the lesson.

iPad
1. Open the Table Of Contents with the "Menu" button in the top left corner
2. Swip left/right on any lesson and a "Go" button will appear. Click it to launch the lesson.