I’m trying to draw a full body anime girl, but the anatomy is very weird looking. It was easy to draw the hair, but the arms and legs were not easy. The abs are unrealistic. I think my anatomy and proportions need work. I used markers and colored pencils, what should I do to fix my mistakes?

I’m trying to draw a full body anime girl, but the anatomy is very weird looking. It was easy to draw the hair, but the arms and legs were not easy. The abs are unrealistic. I think my anatomy and proportions need work. I used markers and colored pencils, what should I do to fix my mistakes? | Artwod Feedback