Work with what appeals to you most. If you enjoyed the image streaming part of the course then work with that, use it for a while and see how you develop from there. Or any other part of the course for that matter. You can do the whole course over again if that is how you enjoyed it.
I Spent 30 days on the HTT challenge. Focusing totally on that aspect of the course leaving the rest. Now that the HTT feels like second nature I am now returing to it in the same fashion. Doing what I feel inclinded to work with. If you enjoyed the Direct Learning part of the course by all means do it. No need to bypass it just because you haven't done the photoreading course.