Weight lifting / agility cl at school?

I am going back to school tomorrow and I signed up for a weightlifting and agility cl called bigger, faster, stronger. I am sort of apprehensive and nervous because for sports, I have only been in the weight room 3 or 4 other times. I don't know how to use the equipment, but I'm not sure the teacher will explain how to use the equipment because the cl consists of only other people that play sports and I imagine that they will know what they are doing. I'm also kind of nervous because I'm very skinny with no muscle hardly. And another reason I think the teacher might not explain how to use the equipment is that he used to be the football coach for years, and years, and the he is an teacher that doesn't explain anything. Any Advice?