I live in England in the south, and a word of advice, you're going to struggle to find a Western riding school to start with, let alone a reasonably priced one.
You don't have to wear the "silly clothes" if you ride English, but at a riding school you will have to wear a riding helmet. And with either discipline you'll need to buy boots with a heel.
Also, riding English, you don't have to learn "dressage" if you don't want to. I've been riding weekly for a few years now and haven't learnt any of the "dance" moves yet
They are incredibly advanced moves, and it'll be years before you understand how to just ride the horse, let alone give advanced aids.
I'd suggest trying out both riding styles if you can, you may enjoy one more than the other. If you're indifferent to the style it might be a better choice to ride English... simply because it's easier to find a good riding school.