Well, I suppose that's better than rustling Li'l Jimmys.
Sorry, WWE joke.
Since everyone else here was kind enough to point it out...I won't bother telling you that you need to coninue the Main Quest before you encounter Dragons. And since others have mentioned it, I won't include that you should Fast Travel as much as possible to ensure you get even MORE dragons on your travels after continuing with the Main Questline.
After all, if I were to tell you those things...it would be redundant. And I'm just not that guy.