Thank you very much @Giigle !
You definitely should visit it whenever you will be able to. From Nice area to be honest I would suggest to go by car, it is nearly 400km to Firenze, so aprox. 4,5 hours drive and passing by a very nice coast and very nice places. In this way you would be also flexible to drive around and visit all the beauty of this region.
Eventually you would like to fly then you can take a flight from Nice Airport but you will need to make a stopover in Rome or Paris CDG, not bad option as well as you can get reasonable prices and a not long layover with a total flight time between 2,5 and 4,5 hours according the selected option.