I personally wouldn't move there I'm just back from holiday and found the whole place alarmingly deprived, isolated and wet.
You absolutely cannot judge our entire country on one holiday. Some places are isolated, like any country, but there are many busting towns, cities and villages. Some areas are deprived, like any country, but many, many more are wonderful places to live with lots going on and beautiful scenery.
OP, if you can't drive then I would definitely recommend Abergavenny. It's surrounded by mountains and countryside, a lovely market town, little theatre, bookshops, wonderful market and lovely people. There are also good rail links to Cardiff (if you wanted a theatre trip for example), and a very good large, hospital.
You wouldn't need to drive and Nevill Hall Hospital is right there. I've used that hospital frequently and I've nothing bad to say about it.
And by the way, thank you for choosing our beautiful country. I hope you'll feel welcome.