First of all, I want to compliment your stylization, shape language and the personality! I could immediately tell by the expression that this girlie is mischievous, confident and fun. Your lines are also pretty good already, with smoothness and variation! Miscellaneous art exercises for improving line quality: the website Practice Drawing This has loads of exercises to improve shaky lines, I would suggest doing it with a pen on a piece of paper, not digitally. But if you work with a stylus, and you want to keep progressing in your work digitally, I would suggest doing it on your tablet for you to develop dexterity with your specific chosen tools. (I myself draw with a finger on my phone, so my tool journey is a bit out of wack) There is a mobile app called Magic Poser, and in the free version you can pose the model and I believe distort perspective. I can't give any advice about perspective because I didn't study it yet, but I usually mock-up my pose in Magic Poser and use it as a reference. Exercises I would suggestL 1. Tracing over your chosen reference image and using very simple 3D shapes to understand the position of all body parts. Keep in mind the shapes you want to break your character down into. In the red breakdown of the reference image in the corner, I tried to follow shapes you used, so thanks for leaving me that guideline! (Note: I distorted the perspective in Magic Poser to get that specific extreme angle that, I beileve, you were going for. Practice Drawing This also has loads of 3D models you can practice perspective and understanding volume on.) 2. Do a sketch of your preferred pose, on your own, without looking at the reference. THEN, overlay your traced 3D shapes on top of it. Use the face as the contact point. Then use your traced shapes as a reference to redraw your sketch! I followed these steps and this is the result I came up with. This is where I would encourage you to redraw the sketch according to the traced shapes! I will put the shapes as a standalone in a different paintover for easier comparison. | Artwod Feedback