Well, I have three yorkies. Two of them are currently puppies and now about 20 weeks old.
Do you know if they will be started on paper or pee pad training?
Mine were started on pee pad training and that was a huge help to me. I kept my two together in the same crate or pen when they first came home but ended up splitting them into seperate crates after about the first month. I normally just crate them when I'm not home and then they play with us or I try to let them play together in an xpen I bought. The xpen has been awesome to have. Its helped me limit their roaming area which is nice while they are still potty training.
One of the things I was warned about with getting two puppies at once was that they might be more attached to themseves than to us. That hasn;'t been the case for us so far but we also try to give them time with us apart from each other. My daughter might play with one while I take another puppy into another room. I've found that they really need to be out of sight (and sound) from one another when I try to train them. i.e. sit, stay or they won't listen since they are more interested in playing.
They have been a blast. Its so funny to watch them run around and play together. When my adult yorkie jumps into the mix, i call it a ball of furry...get outta the way
Get lots of toys...lots of indestrucible chew toys
and a couple extra washable doggy beds. I noticed that I need to clean their area's more and wash their beds more than i did with my first single puppy. They tend to go crazy when they play and toss everything around whether its food or poop or something else
There are so many great people on YT. Your going to get a lot of information. Everyone just has to figure out what works best for them.
Let me know if you have any specific questions via the posts or PMs.
good luck!