Will a nose job make me look more feminine/softer? (photos)

I would recommend starting with a consultation with a board certified facial plastic surgeon that specializes in rhinoplasty surgery to discuss if rhinoplasty can address your concerns. 
I would recommend writing down the following questions before scheduling your consultation:
1. Are you unhappy with the tip of your nose? 
2. Do you feel that your nose is too wide? 
3. Do you want to make your nostrils smaller in appearance? 
4. Are you looking to decrease the general size of your nose?
I hope some of these questions will help you pinpoint what it is that you don't like about your nose.  I wish you the best as you research your options when scheduling a rhinoplasty consultation.
Sincerely,
Philip J. Miller, MD, FACS Double Board Certified Facial Plastic Surgeon

First of all, I think you are starting off with a fairly good looking nose, and even though there are few things that could be improved about your nasal appearance, you have to be careful about not making it worse. For example, you have a slightly overprojected tip, therefore lowering dorsal height without changing the tip projection is not likely to give you a good result. I think, computer imaging is very important in your case. It could show you what you can expect from various changes in your nose (lowering the dorsum, lowering tip projection, narrowing your nasal bones, etc) and help you and your surgeon to formulate your surgical plan.