Hi I know of a few clubs in this area.
One is in Wakefield, and the people are
very friendly. However in this ring it is more about getting the dog to go around the ring properly for a handler, and not with yourself as the handler.
There is another club in Huddersfield. Although a couple of people within it have handlers the rest of the people handle their own dogs. They also do obedience and agility on a Sunday.
There is another club in Wakefield that has a show night, but I have never been to this before. The hall is rather small though, and so I expect that it would only be OK for topping up on general open show training.
There is also a 'match night' once every month at another Huddersfield club, and this is like an informal show. You put your dog against 1 dog, and the winner goes against the other winners. This is also indoors.
What 'type' of GSD have you got, because from what I have seen the 3 different types are handled in 2 or 3 different ways.

Until you know how to handle your GSD I can only recommend training it so it will allow its mouth to be opened, and its teeth to be inspected by a stranger :-)