Don't stress yourself out about it ahead of time. That's was I did before Sadie came home - I was a nervous wreck by the time I got her because I'd never had such a small dog before and because of all the housebreaking horror stories I'd heard. She's 11 months old and been 90% puppy pad trained for about 5 months.
You and your little puppy will be just fine!!! I'll just take a little time.......