My advice is to not start trying too much yet. I'm afraid you'll end up very very frustrated after trying to house train for the next year if you start so young. Mine is still only about 75% trained and he's 7 months old! I would suggest to try to make it convenient to have him on his pads around potty time, but don't expect to really start training him until around 12-16 weeks. It's an intensely long process to house train yorkies from what I've experienced and read. I may just have a little stubborn fella though