Hello I am new here and I want to become a breeder , but I am not sure of a couple things

, 1) at what age is too old to breed yorkies , 2) the male should be smaller then the female right 3) how long does it take for yorkies to have there puppies .
I am just getting started on this so a little input would be nice nad to let everyone know that I will not start breeding untill I know the do's and donts of breeding yorkie's . Thank you for your time and your opinions .