Need some advice

I need some advice. I’ve have really been thinking about having a breast reduction. I’m 23 and I used to be a d cup now I’m a triple d. My boobs are really heavy and my shoulders and back kinda hurt sometimes because of that. I’ve been told by people that my insurance would cover a good portion of the surgery. Has anyone ever had reduction surgery? How did you start the process.. like who did you go talk to first? I just need any information I could possibly get.