Your puppy is learning every moment of every day. It doesn't matter if it's a training session or not, the pup is always assimilating new information.
I start right away with rewarding good behavior, luring, crate games, socialization, handling and husbandry training, etc.
YouTuber Zak George has started a new series. He just got a BC pup and is filming his training process. They have been pretty good videos so far. You may have to adjust some things to your pup, but it wouldn't be a bad place to start.