Neobladder being planned. But first chemo!

I am a 62 yr old male. I was diagnosed Oct of 2022. So my last TURBR (4th & 2 rounds of BCG) found that my cancer has now spread to the muscles. This was not the direction this was supposed to go.

We are scheduling a neobladder surgery but probably doing cisplatin-chemo first. Apparently outcomes improve with doing chemo first. I do not know the side effects of this chemo yet. What sort of questions should I ask my oncologist when we meet up? I also don't know time-frames for this. Like is it a month? a year? Weekly or monthly? On backorder like everything else I seem to need.

Any advice for my nervous self?