Awww don't be nervous, it's not like you are getting a wee lil baby and needing to pad train and all that goes with caring for a baby. Having 2 yorkies is not a lot more work especially when the 2nd one is an older one. Abby will love having a BFF once she feels confident being around him. And you will be saving a baby that was thrown away for what ever reason.
Today is the big day, go see this lil fellow, you will know if he is right for you big HUGs to you