Glad you found YT
I used to breed Bichons, and my male when he was a pup really didn't know what to do with being on leash. He hated the idea of being led around or even the leash itself. To help him adjust I would put the leash on him and let him drag it around, so he got used to the feeling.
With time, I would pick up the leash and lead him, it didn't take long before he would walk on the leash in an appropriate manner.
yorkiesmiles