You can also go to YTCA and take a look at the yorkie standard and also see pictures. You can also get a magazine -The Yorkshire Terrier where many show people place show pictures there. That will get you a start of looks, but you also have to read and check your baby for confirmation, coat texture, bite, etc.. which photos don't show you. And Pat is right - go to as many shows as possible and yes - have fun! Best of luck!
T.