Christine
You fell in the bear trap Run to Texas, spend your money, get a non resident license, which is invalid without a resident license somewhere, or supposed to be. Or you got a Texas resident license , Which means you fibbed about your resident state
In North Carolina your resident IA license is called the Self employed Adjuster License and you get it by taking an exam. There is no classroom requirements. When you see the outline and take the test you will see why they don't require a class. If you can pass you know the information, You apply then register with the promissor and go take the test. It's 100 questions and covers everything from statutes, auto, workers com, inland marine, commercial , to property policies.
If you can pass the test you will have a good grasp on policy. You can take an agents course on these or you can find the books and self study, although your eyeballs will bleed.
This site will get you started
Here is the outline of what you should learn
The adjuster section starts on Page 13
PS this is a real exam, not like the one you took for Texas , so make sure your prepared. Also they are correct , you could have found all this on the front page of the NC DOI site. Its a real simple site name " NCDOI.com"