I'm interested in hearing feedback as well. I started playing Christmas Day (it was my gift!) and I usually practice for an hour per day. I review previous Fundamental lessons, playing with the jam track, so I'm technically always practicing those. But once I feel like I understand the concept and the purpose of the lesson, I move to the next one. I usually have something fun that I'm working on as well, such as a blues scale or an easy song (learning a Bob Marley tune right now). Moving on and doing something fun helps me when I'm getting frustrated because I'm not playing the Fundamentals song "perfectly." But I've asked the same question... when it is ok to move on?