If you want to keep this little Yorkie, you might want to start by seeing him as a 2-year-old human toddler...fragile, loving, independent, smart, and devoted, but without the knowledge and wisdom that comes with time and training. You will also find that he is likely a little joking tease who will enjoy entertaining you with his ever changing antics. If you begin training him the same way you would a human baby...and yes I do mean 'conversation' even reading to him, associating a physical 'apple' with the word "apple", and talking to him about the TV show or news broadcast you are watching as though you expect him to grow up, go to prom, drive a car, understand how the world works, and raise your grandchildren, you will begin to see the rewards a Yorkie will give you...and they are huge!
There are carry-packs...pouches...you can 'wear' him around and he will likely love it. You can put shirts on him to keep him warm (and cute) and he will likely love it. Do nothing to him you would not do to your own human offspring. Watch HIS body language to learn what he needs and/or wants to do. He may already indicate he needs to go potty by going to a door, walking away to a wall, hall, room, or other possibly secluded place. Example: When we got Brody, he had mostly been kept in a bathroom to keep him safe from his 95 lb. year older brother. The first night he was at the house, we had a storm. At the first crack of thunder, he got up and headed toward our bathroom. Why? That was his 'safe' place and he was uneasy because of the storm. Because I was in over-achiever-observer mode, learning him, I instantly recognized what the problem was and ran to pick him up, hold him, and give him a new 'safe' place in my arms.
My DH always had big dogs and never thought he would like little dogs...never gave any thought to owning Yorkies...never thought there'd be a difference except for size. One Yorkie, Brody, changed all that...now we have two...we got Mia as a companion for Brody...and he'd take more in a heartbeat. He's even (finally...lol) put in his first top knot!
But, it IS a different mindset. Yorkies are 'technically' canines...but in reality, they're human children on four paws who'll eat poo, dig and roll in the dirt, and they will love you back like you cannot believe.
I've had large dogs, too, and a Yorkie-Poo when I was a child until I lost him about 12 or so. Yorkies are 'working dogs' but unlike most working/herding dogs, Yorkies were bred TO THINK INDEPENDENTLY...and they do...oh boy do they...and it's wonderful to watch their little minds work! Like a little child when he sees a flower or bee for the first time...you will see wonderment in a Yorkie's eyes! You don't have to teach them everything...they analyze your actions and in short order know what your next move is going to be. Humans should be so smart!
We have to spell and motion and 'allude' because Brody and Mia have such large vocabularies that it is hard to 'sneak' out without them knowing what we are planning. The flip side is that, by training, when I say in my firm Yorkie voice, "You are not going this time," they sit down with the same dejected look a child would have...but Mommy has spoken and resistance is futile...lol Oh, yeah, they usually get a toy or new outfit when they have to stay home...a reward for being good while home alone.
Get him a blankie, a playpen, a high chair...feed him off a fork or spoon during your meal, off your plate, let him drink from your cup (you can get a new one if you like)...put a bib on him to keep him clean, wash his face after meals...whatever helps
you see him in the proper perspective. Keep in mind always that whatever HE does wrong is YOUR fault...your failure...just like any child...and
lead him to the knowledge and behavior he must have.
If you are not prepared to deal with, or interested in nurturing, a canine toddler, trust me when I say there are plenty of people who'll take that baby in a heartbeat and love him like he's their own natural born infant...we love them THAT MUCH!! If you're planning a Florida vacation, bring him with you, PM me, and I'll take time off work and I'll meet you at whatever airport anywhere in FL you land, and he can come live with me. Brody and Mia will have no problem sharing the bed, the lap, and being glad it's HIM in the bath THIS TIME!
It is easy to throw up your hands and quit...much harder to change your own ways...which you will likely need to do for a time...at least until your 'Yorkie-ness factor' kicks in.
For your sake, and his, of course, I hope you are beginning to understand how precious these babies are. If so, and you decide to take on this unconditional commitment, prepare to have your heart exploded to an exponential love factor 'cuz nothing...NOTHING...else can do that quite like a Yorkshire Terrier!