Where should I start to fix this face? (Photo)

hello thank you for your question and provided information as well... based in your question and the picture you showed you are a good candidate for rhinoplasty , in your case with technique open and elevate the tip.

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.  Cost will vary due to various factors like anesthesia fees, facilities fees, etc. 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

What you have is craniofacial plagiocephaly with a flattening on one side of the back of the head and a resultant facial asymmetry in the front. The back of the head is treated with a custom skull implant to build up the flat side. For the face it is important to create a list of the asymmetric facial features and prioritize what is most important to least important to establish a treatment plan. Only then can the specific facial procedures be determined and the cost to do so provided.