Same nose but everything smaller? (photo)

You can certainly achieve a result similar to that goal.  Refining those elements can be done very naturally.

  The nose is a 3-dimensional structure, and the changes that a rhinoplasty produces are measured in all 3 dimensions. A full set of facial photographs are required to make any determinations.  A rhinoplasty typically can accomplish narrowing the bridge line, narrowing the wide tip, shaving down the dorsal hump, and narrowing wide nostrils.  Digital computer imaging would also be helpful to understand what can be accomplished with your nose on your facial features.  For many examples of rhinoplasty, placing the link and video below

Congratulations on your decision to pursue nasal reshaping.  I think you're an excellent candidate and seem to have very realistic expectations.  It's very difficult to tell the extent of change and the impact it would make on the overall proportions of your face given the one picture you provided.  Even a small change, though, can make a big difference especially on a female face.  I would recommend doing 3-D imaging with a board certified surgeon to get a very realistic understanding of your desired outcome and then you can decide whether or not it is worth it for you. Best of luck!