Welcome to YorkieTalk Tracy and Luna!
You have definately come to the right place if you want to talk with friendly people and learn about Yorkies.
My suggestion would be to take Luna to the vet for a good check-up for congenital disorders and to get your vet's input as to her breeding status. If you get an ok from your vet, then you need to wait until he second heat - give the wee little one a chance to fully mature. That will give you plenty of time to fine that perfect male to compliment her.
Good luck!