First chemo Tuesday, is it best to fast before infusion or eat?

I would suggest something light before you go to the first one.  At my clinic they always fed and watered us well but I don't know if that's the same everywhere so perhaps ring and check and if not, take some snacks and drinks with you.  Once you've had that first chemo, you and the nurses will know how you cope with it.  I was quite nauseous the first time and had to be given something after the chemo to deal with it.  After that, they knew how I would react and the infusion never made me feel sick again (a day later, it was a different story).