PT or O&P

I am a college freshman majoring in exercise science. I have been planning to go to physical therapy school, but I am really interested in working with prosthetics. If I was PT, would I be able to work primarily with amputees? How are would it be to find a job like that? I have recently considered O&P, but I am worried it would limit my options too much. What are the differences between the prosthetist's and the physical therapist'ss role working with amputees? How do you think the job market for O&P will look in 10 or so years?

also posting on r/physicaltherapy