Orla is nicer but I'm Irish so would say it "Orr-la". Is thst the way you would prefer it? Its an excellent point to look at how local accent influences what she would be called by her school friends and teachers etc.
As for Nora - its a no. Just dull I think. But I don't fibd this trend of putting names that are currently found on senior generations great. So for me thats names like Nora, Edith, Wilfred for example. Some names have their time and maybe thats a good thing. (I'm also thinking of all those 1970's Sharons and Traceys tbh)