So what i did to this drawing, is that i censored nipple imprint (so the drawing won't be considered as sexually explicit) by adding bra, added better cloth shading + outline, and seams on cap.

If you want to know where nipples are located (for artistic purposes)

Simply draw triangle from collatbone, expand it and stop until you get nipple location (as shown on pic). This would be useful when drawing nipple tape (X shaped) or making nipples prominent (mandatory when your character doesn't have chest underwear, otherwise, do not add that detail, it would be unnecessary and unrealistic, but who even cares?).

Drop some tips on how i can improve artstyle, i'll look at them after a while (approx. 12:00 Minsk/Belarus)