There is many opinions of caring for a shih tzu. After I got my first shih tzu I became a groomer. For the past year I've been working side by side with a professional groomer and learning as much as I can. It did mine.
Puppies require a lot of training.
My best advice is start working with your puppy from day one. Start with holding your puppy on your lap when he is sleeping and comb him. Do this regularly and eventually they will feel comfortable with the comb as much as you do. Start using little bows or baby hair clips for their top nots. When they are little it is hard, but make the best of what you have.