Welcome! Where is your new baby coming from? Although we moved to TX in 2009, we spent over 30 years in San Diego area and were founding members of South Coast Basenji Club, so we pretty much know and/or are related by dogs to most of the So Cal breeders.
As far as what to get for your puppy - we provide a "Supply list" for our new puppy buyers. Items on it include: Bitter Apple (works better than other brands), ECO 88 stain & odor control, available online, not sure if it's in CA or not. It seems to work better than Nature's Miracle, which we've used for many years. Also a supply of food, preferably the same brand fed by the breeder. I'm sure your breeder will have a puppy kit which they send with the pup, so you should check with them to find out what you need to get.
Good luck, and post pictures!!