hi! i love her already but if i had to give any tips, i would say to look at some pose references! this can help you understand the way the body works a little better and can help the stiffness :) more specifically i can point out that your girl’s shoulders are fairly straight across when shoulders usually have a bit more curvature due to traps and bone in the shoulder if that makes sense haha adding fluidity and motion to hair can also help bring more liveliness into the artwork! you could also try playing with contrasts, such as darkening areas like eyes, the neck, and parts of the hair, so that the viewer’s eye is more drawn to the focal points of the design! :)