Fantastic to hear that you've gotten an appointment :)
Most first oncology appointments are very explanatory and usually cover most of the questions you have; take someone with you who can write stuff down so you can listen. I guess one question I've thought of from your story is "why chemo first instead of surgery?"
I imagine your granddaughter is a great joy in life and trust me, when you're in the midst of chemo those joys bring you a lot of comfort. You might not be able to commit to the Friday pick up anymore - will depend on your regime (how frequent and the day of treatment you get allocated to) and how chemo affects you. It effects us all differently. For example, I get chemo on Tuesdays. My first combo of drugs I was pretty yucky from the very next day, this current drug Wednesdays Im great its Thursdays everything turns bad. You wont know until you start.
Spending time with her if she has a virus during chemo would not be advisable, as kitkatb said we try to avoid sick people/crowds etc...but remember there's men and women who have their own young children and go through chemo, they manage. Some people still work and manage to not get sick.
But I don't think excluding her for 2-6 months (depending on your chemo regime) would be good for your mental health personally.
