
As Dizzy says, before you start to breed you should know your breed inside out. Your questions show that you are a novice. Nothing wrong with that & the fact that you are willing to ask questions shows that you are willing to learn.
Please listen to the advice of other Apso owners, go & see as many other Apsos as you can.
Your bitches do not
need to be bred from. You should only breed if your bitches are good, healthy examples of their breed & to decide whether or not they are, you need to gain experience. You also need to be sure that you can find suitable homes for any puppies you do breed & that you are prepared to take back any puppies at any stage in their lives.
I was only in my breed 5 yrs before I bred a litter, but I had the breeder of my first bitch to give me invaluable help & advice.