Spanish Conversation Group at Library

Is there anyone here that has attended the Spanish conversation groups at the library that would be willing to share their experience? I have the availability to attend a few this summer but I'm wondering if I'm advanced enough to go. I took three levels of Spanish in high school and have done Duo Lingo every day for three years. My husband's family is Mexican and primarily speaks Spanish when I am with them so I follow conversations well, but I really want to practice my speaking skills. I usually respond in English because I am too nervous to speak and mess up... I'm hoping these sessions would be a good jumping off point for me.