Its always good to edit your drawings as its an important part of the process. Editing should be fun! On my last post of the drawing, a few things looked off, such as the nose being weird and the face being to small etc... So changes always need to be made to improve. But you also need to have really good eyes to spot those mistakes. Feedback and advice from others is good as well for improvement. I was messing around with a blending stick I have since I rarely use it.