As the first Month works through basic exercises, effort on your part to catch up would not be fruitless.
For example, you could spend today, Day 18, starting with some trance work, then flame meditation, then onto todays visualization. Catching up is down to your own motivation, you can "double up" at this time.
Obviously the more time you can put into establishing the basics that have been covered the easier you will find the techniques that follow.
Be sure to read through previous posts on Trance etc. The task of catching up will only be as difficult as you allow it to be, and I think you will be fine with the right attitude.