first things first
Welcome to YorkieTalk
I would strongly recommend starting with some basic obedience. It could save his life.
This is the first time I have mentioned this on YT, but about 2 months after my beloved Howard went to his forever home, his new mommy called me hysterical -- it seems that Howard dashed out the door and into a busy road where he was killed by a car. The driver was so crushed -- he couldn't stop. I was devestated. I loved Howard
A little training and a few basic commands like SIT and STAY would have saved this precious life. PLEASE DON'T LET THIS HAPPEN TO YOU!