I am from Italy and I did take A level Italian but a year earlier. Anyways, I can confirm that I you don't practice for it properly you are not likely to get an A* (I ended up with an A, 94%ums average but one ums off the A* at A2), but it is still far easier than it I for a person that never spoke I before taking the a level. I dont quite know what uni's think of Italian as an a level since I'm taking a gap year, but I know that UCL specifically doesn't consider an A level in your mother language( but Italian isn't your mother language so you should go for it)