Training and Socializing an Adult Dog
The BBS/WSSD is an intelligent willing breed of dog. It would probably be best to first participate in some form of basic obedience and then decide which venue of activity you want to pursue.
Identify a group or club that train in the venue that you have chosen. A club would provide a learning experience for the chosen sport and also provide beneficial socialization for your dog with like minded dog owners.
If your dog has special training needs that exceed your ability contact a reputable professional dog trainer in your area that can guide you through any concerns.