It all looks quite good so far, only glaring issue I could really point out is that the figure of your main character reads (at least to me) as being quite masculine, and this is fine if you are going for a more androgynous figure but you just seemed to be referring to her with she/her pronouns when the vibe I get from the…
While the face normals (the one from a center of each triangle ) looks perfectly up those normal are derivative as a median of vertex normals in triangles corners. The bottom left corner for example , clearly not 90 degree up . it's what creates shading gradients. Face weighting, or direct normals editing could fix it .…
Blender for example has an additional option for symmetrical edit: Toplogy Mirror.. so even if not absolutly symmetrical the edits are mirrored.. IDK Maya good enough to tell when it uses this..