Yes. You can skip ahead by doing the following:
Mac/PC
- Open the Table Of Contents with the "<<" button in the top left corner
- Right or CTRL-Click any lesson and select "Unlock Lesson"
- A "Go" button will appear. Click it to launch the lesson.
iPad
- Open the Table Of Contents with the "Menu" button in the top left corner
- Swipe left/right on any lesson and a "Go" button will appear. Click it to launch the lesson.