Writing Groups

As part of my quest to get better at writing I've decided to actually follow the advice I keep seeing out there - yeah, I know, that's a radical idea and all, but it just might help... So, I found a nearby writer's group and intend to go there next week.

But that leads to my question. What to expect?

Maybe each one is different and I need to go to see, but figured I'd see if anyone else here has ever just jumped into one of these and what it's like. As a newcomer, I wasn't planning to bring any of my writing, just see how it goes first time. Is that reasonable or expected? And, to be blunt, I'm also unsure how to say that I write tg fiction. I don't know the group, after all, and am, well, a bit shy about it.

Anyway, looking for advice or other peoples' experiences.

Thanks,

Titania