I am not a dispatcher but I can offer a little advice on managing work and treatments.
The radiation team was very flexible with the radiation schedule. Normally I would go first thing in the morning but sometimes I had early morning meetings and I could change my appointment time so I didn't have to miss work. Talk with the team about when is best to schedule the treatments and what flexiblity they have.
Eating during treatment is never normal. You will lose your appetite and then all of a sudden have a craving for food. I would plan to bring food with you but know that you may not want what you brought and may prefer a candy bar from the vending machine.
As far as changing shifts, you will have to see how you feel. The first several weeks of treatment, I felt find beyond a little tired. As time went on, I started to feel a bit more ill. You may want to discuss your treatment plan with you supervisor to see what is best for your community, you, and your team.