The next steps : I would strongly recommend that as part of your practice that you continue playing one or two of the songs that you have already mastered. By doing this you will continue to improve the sensitivity of your playing together with your dexterity, skills which become easier with songs with which you are familiar.
I would not suggest that you attempt to work through all the songs in Section 2c at the same nor indeed any of the songs that you don't know or like. Ideally, pick one song and certainly no more than two songs that you would like to play and work on these until you feel that you can play them comfortably and fluidly without hesitation before choosing something else to play.