Hi Paul, welcome to the wonderful world of Jaguar motoring and to the Forum.
I can confirm the NC500 is a great outing with lots of Scotland's magnificent scenery on offer. I am also sure that there are great driving roads closer to your home in Antrim where you can cut your teeth and get used to the feelings the Jaguar gives you and your new wife.
If you want to get adventurous, then I would suggest planning a trip to Lake Garda in Northern Italy. Don't take the conventional route of getting across to the Continent and heading down through France before hanging a right at Lyon though, go for a North about route, taking in Belgium / Holland, Germany, and Austria before entering Northern Italy through the Brenner Pass. You can take your time with plenty of stopovers in some great locations, try Autobahn, Autostrada and N roads, whichever takes your fancy.
Once at Lake Garda, there are many picturesque villages, with great hotels and restaurants to while away the restful time.
This is a trip my wife and I have undertaken over 20 times in the last 30 years and we still keep going back, it's a great trip to a great location. And, depending on your time and resources, you can make such a trip as long as you want.
Enjoy.
N6 JMX