If not now, when?
Schedule some time in your calendar – but make sure the environment is appropriate and you are able to focus.
I believe that you will gain the most from this program if you have a clear idea of what you want to achieve and how you can make it happen. I would recommend therefore that you spend some time adding plans to each of your action map branches before moving on.
As you go through the course, you can update your action map with ideas, plans and actions.