i was going to offer advice is all.., but now, i can see from the cheater sketch you dont need it..,

the cheater sketch respects the fact there are no lines in life, just shades and hard or soft edges caused by shadow, reflected light and such, great dynamics from drak to light (contrast)

this one has hard edges and no dynamic range of values (no contrast, the blacks neeed to be at 0 while the whites at 100.., and the mids respectfully in line with those values.., in other words if this was a colour image it would be in need of a good vectorscope going over and so.., it looks flat.., there is also a strange glow (which could be sylyised??) around her, the face looks disjointed because there is so much more detail there.., not sure, looks like the helmet has been drawn around the head.., like you spent so much time on the face you got tired of the rest of the drawing

but i imagine this to be simply a draft and a very well done one indeed

dont be afraid to get in there with a very sharp 6B

dont take this the wrong way mate

buck rogers?? last tie i saw that it was a comic???