I’ve had this issue for a very long time, where I get unmotivated/lazy/unsure after sketching an idea. I also dread the fact that I take forever cleaning up the lines and I just can’t get myself to do it often enough to catch up on all the wips. Also there’s an issue with not having a model handy and I keep telling myself I need to study from photos more yet the motivation is…not really there.
It might help if I wasn’t so short on time and kept putting so much on my plate with everything else in life. Also sleep. More sleep might help.