Even if you try to transition to the outdoors, your puppy will be confused because you will likely have items resembling potty pads lying around the house. Do you have pillows? Blankets? Sheets? Rugs? It’s not a stretch to think that your puppy, or an older dog, even, may confuse one or more of these items with plushy, soft potty pads and decide it would rather go there than outdoors. Just save yourself the headache and don’t use puppy pads.
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.