Welcome to YT and congrats to being a soon to be new yorkie mom
I had been looking into yt'ers for a few years before I got my Bailey. He is 2 yo now, and boy time flys! The one thing that I found very helpful in my search and info was to use a harness, not a collar, due to the possible trachea problems with this breed. Congrats and the days/nights must seem long now that you are getting closer to owning one. Ahhh, bring back fond memories of Bailey when I brought him home. Everyday since then we still say how freakin' cute he is.
Looking forward to pics when you have the time in all the oooing and aaawing that will be going on in your home.