It is nice to say that at 14 you can choose your religion - but you're still a child then, depending on your family and thus depending on their decisions. And if you're unlucky and your grandparents, parents or whoever is responsible for you does not accept your opinion on the matter, there is no choice.
I was baptised by my grandfather who was a minister so no escape. Fortunately there was no pressure on me to be confirmed ( he died when I was 4).