Start with A Trainer's Warning: The Reality of Owning a Malinois, Pit Bull, Or Other "Protection" Breed (17 min, Stonnie Dennis), then Why Do Dogs Pull On The Leash? (12 min, Stonnie Dennis). All 373 lessons here are free, from the teachers' own official uploads. You'll need training clicker, treat pouch, long training lead and a few more basics (about $95 of kit). The book to keep beside you: The Other End of the Leash by Patricia B. McConnell.