Your little one is really adorable. No worries, whatever questions you may have, you will get them all answered. So far I've owned two yorkies. My first one was a rescue from a back yard breeder. This site actually helped me turn her from a small skittish little thing into a diva (I say that lovingly)
RIP Brandi
Anyways, my current yorkie (adopted) is trained to use potty pads and go outside. It works for me and surprisingly it doesn't confuse her. Find something that works for the both of you. I know some yorkies won't go outside and some prefer to go outside. In time you will figure it out. And once again, congrats on your new baby