Where can I find ghostwriting services

I am a medical professional working as a heart surgeon in a well-reputed hospital in the USA for the last 8 years, and working as a heart surgeon is quite a stressful job to relax my mind sometimes, I do write my notes or poetry but now I think it will be a great time to start writing my own book but the thing that stops me is I don't get enough time to keep up the book and I do not have any experience in this field. One of my colleagues has introduced me to the concept of ghostwriting. Now, I am lost with the ghostwriting services rate and where can I find this service any leads from you guys will be a great help.