Welcome @Joleystub, I had a grade 3 diagnosis and assume a similar treatment plan, 4 round of AC and 12 weekly paclitaxel which I finish in May. I’ve just finished radiation. There are no rules about what to wear, although they will want to be able to insert a catheter easily into your arm without your clothes getting in the way. I wore a comfortable pair of lounge type pants and a t-shirt. It's pretty hot up there in Darwin so the aircon could be pretty cold at times, so I also took a blanket.
All the best for Wednesday 🙂