Welcome to you and Rascal
Congratulations on your new baby. I am sorry that you are having a rough start to being a Yorkie parent.
For tonight I would feed him small bits of chicken every 2 - 3 hours. Since you have already had a problem with hypoglocemia, I would not let him go more than 4 or 5 hours without eating. Your little Rascal is very young and very small, so you don't want him to go without eating for very long. You might boil some rice (brown is best) or pop a potato in the microwave and mix the chicken with the rice or potato to give him some complex carbs.
You might want to find a high quality puppy kibble and start by mixing a small amount of kibble in warm water mush it all up and add bits of chicken, gradually reducing the amount of chicken and increasing the amount of kibble until you can stop adding the chicken.
OR.... you could take the plunge and just home cook for him. There is a huge amount of information here from those of us who home cook - if you do a search on home cooking a ton of info will show up.
Good luck, Neighbor.