I guess it's too soon to know how you will feel. The hardest thing is the triggering of your own emotional response. I do counselling and often end up with cancer patients, sometimes it's not an issue and other times it really impacts me. The other challenging part is understanding and supporting the individual which will be quite different from your own experience.
I suppose all you can do is get through treatment then see how it goes. Supporting people with recurrence and metstatic cancer may trigger emotional responses and fears in you which can come out of the blue. You will need to be mindful of this.
