The modelling looks OK (from what I can tell without wires), and the textures, especially the clothes are pretty much OK. However you could improve the clothing using the Irwan cloth reflectance models, at the expense of a lot of render time.
Skin texture looks a bit weird, and makeup a bit overdone. Too shiny., so less specular / reflectance, and more roughness required. You could try adding some Subsurface scattering, and some additional texture to that, it's flat as well as shiny !
Hair isn't very well styled at the moment, some additional time doing that would also help.
Then you could fix the lighting, which, whilst not bad exactly, is a little 'unremarkable' at the moment.
Hope some / any of that helps
CBR