The next step is to teach your dog to ring the bell for a treat. Your dog has to be motivated to ring the bell, and in the beginning going outside isn’t enough to motivate him. But, if you teach him to ring the bell for a treat, he will quickly learn to ring the bell. You’ll want your dog to ring the bell with his nose, so make sure you hang the bell so it is nose level.
Before enrolling with a particular club contact them and ask if you can go to watch a class without your dog. This will help you decide if this is the right environment for you and your dog. Some clubs have waiting lists and you will need to book ahead, some accept people on a roll on roll off basis. Prices will vary from a joining fee and then weekly payments to a one off fee for a certain length of training.