Your baby is adorable. Yorkies come in all flavors. lol. I've seen so many with different looks. My Hot Rod is black and gold while Maggie is bright silver and tan. Never can tell.
As for potty training, we have ours on pads and outdoors. This way if we are running late or if it's pouring down rain, they can still do their business. We have a pad in the expen as well as hubby's garage for them to "go out". Maggie used to wait until she came be in from outdoors to poop. She eventually started pooping outdoors.
My 2 are 3 1/2 and 4 and now prefer to do their business outdoors. Maggie will use the pad if she absolutely has to for poop but you can tell she wants to either go in the garage or outdoors. Hot Rod, given access to the front of the house will poop on the front carpet.
He totally prefers to go either in the garage or outdoors. t's really weird, he (they) have absolutely no problem peeing on the pads one bit.
I've just gone back to using gates within the past couple of months (closing off the front part of the house) to sort of go back to "crate training 101". It's worked but it's been a pain having the gates up again after 2 1/2 years. But it's definitely doing what it's supposed to.
good luck and you just need to be patient.