Campo dei fiori tomorrow (Rome)

Hi everyone! I'm on my way to Rome tomorrow, and I am a bit late (a lot late) in planning my day there. I'm hoping someone can tell me the cheapest way and easiest way to get to Campo dei fiori from Fiumicino airport. I'll be spending the whole day in Rome, wandering around with my suitcase, so also if someone wants to grab a coffee, please let me know!