It is clear from your posts you really want to go things properly... So would it not be wise to learn the breed for a few years to know what you are buying in your female? You know what it takes to champion a short haired older breed, but dealing with a toy breed that is so young comparatively- picking a good enough girl (or two) will take time to learn, rather than getting them now and them growing to be pet quality only.
Is your goal to make money on it- because you really shouldn't with yorkies... They are very expensive fo raise given their size. If your aim is to contribute to the breed, then buying now and breeding your girl to your boy once she is old enough (and as you say you know, probably won't be the best match to your boy) may not be the best start. I didn't start out great- I have learned and evolved, but you have the chance to start great and stay that way! So please consider holding off on the search for your girls until you have stuck around a little longer to know what to look for (and what to avoid); it will benefit you soo much in the future... And with pooyi still go go through adolescence, the break between pups won't be a bad thing at all!
And apologies for sounding so preachy at you all the time!