Your nose can definately be improved without making you look weird or dramatically changing your appearance.
As I'm sure you're aware, you do not have huge deformities to your nose. What I see is: a moderately bulbous tip, some wideness in the middle third of the nose, perhaps a very slight hump (tough to see from this view) and a little excess columella (the area between you nostrils).
Each of these issues can be addressed with precision with modern rhinoplasty techniques. Make sure you seek out a facial plastic surgeon or a plastic surgeon who emphasizes rhinoplasty in their practice. Rhinoplasty represents greater than one third of my surgical practice. The surgeon should discuss in detail what s/he intends to do and show you representative before and after pictures.
It's critical that the surgeon ask you about how you breath through your nose - the examination of the inside of the nose is just as important as the outside of the nose! It's certainly possible to take a nose that breaths well but doesn't look great and change it into a nose that looks better but doesn't breath so well - a good rhinoplasty surgeon views that as a disaster.
Take your time finding a good surgeon and you should be fine. Hope that's helpful.