Sheffield and surrounding areas actually pretty good for amateur dramatics...although in reference to your other post about not having any talent and wanting to start a rock band...what makes you think this is the answer???!!!
I am a member of the Stannington Players. We meet and perform at The Lomas Hall Church Street Stannington which is near to Hillsborough.
Just turn up on a Monday night 7.30 to see if you would like to join.