Struggling to maintain motivation
2yr
 TeusFlips 
So I have found that since beginning in programs like proko and DrawABox, I have been struggling to do any drawing work that isn't technique based, like ghosting lines and confidence lines. But I can't seem to motivate myself to draw from imagination, I typically get done the sketch and structure phase, but then find my self unsatisfied and moving from the piece.
Should I just move on to a different piece when this happens? I feel like I should power through so I'm still finishing even if I'm not happy with it, but on the other hand I think learning to let go and start over might be equally valuable. I used to only draw creatures but I'm trying to draw people, which is when I started to have this challenge.
What are some thoughts about how I should approach this?