Hi, I had my long hair cut short for hospital but didnt have it shaved short till after my first chemo when it was about to fall out anyway. Its a personal decision. I felt long hair falling out would be more traumatic.
As for your veins I had a porta cath inserted in my chest because my treatment went for 18 months and I had very bad veins. Id ask your team and talk to your oncology nurses whether your treatment would be easier that way or with a PIC line thats just in the upper arm. If you have a lot of treatments go at least for a PIC, but if not too many perservere with your arm.