As a rule, they tell you to come without your dog and just observe the first time.
Training starts with tracking if it's the weekend. If it's a weekday evening, obedience is first, followed by protection. You are expected to keep your dog securely crated in your car while others are training. A crate will allow you to have the windows and tailgate open for air circulation in hot weather.
The club will have a designated trainer who will help you learn the ropes. Most people in my part of the world use either hot dog bits as rewards for obedience or a ball on a string or a small burlap tug.
For protection, the helper will likely start your dog with a tug on a rope, or maybe a flirt pole to see what the dog has in the way of prey drive for a moving object. Once the dog is getting really excited about biting the tug, then the helper will likely start using a bite bag, or a small puppy sleeve, then gradually transition to a full sized sleeve.