You didn't say if you are meeting with a surgeon or an oncologist, maybe both. No matter, you should have the beginnings of a plan. Some surgeons are also Oncologists, but I elected to have an Oncologist in addition to my surgeon. I also had a radiation Onc.
My advice at this point is to be sure that you REALLY like your doctors. You will be seeing them regularly for many, many years.
I always tell people to get copies of everything - diagnosis, bloodwork, etc.
You will probably be told the size of your tumor, stage, etc. Sometimes that can't be determined until surgery. Sometimes, if a tumor is large, chemo will be first, then surgery. That's quite common.
My surgeon told me that I had the choice of a mastectomy or lumpectomy. Because my tumor was at the top of my breast, she suggested a lumpectomy. There is no more of a risk by having a lumpectomy vs mastectomy for BC recurrence. I was very happy to know that!
Let us know what happens at your appointment. Hope you don't have to travel too far. Some gals don't live in an area where there are breast surgeons and/or Oncologists, unfortunately.