I got my license a few days after I turned 19. I was terrified of driving up until 18. I know some of you said it only took a couple hours of driving for you to feel comfortable, but it took much longer for me. Even after I learned how to drive properly, I was still constantly paranoid I would cause an accident somehow, or be in an accident. I didn't even drive on the highway for the first year I had my license because I was too scared of merging and going that fast. It wasn't until I bought a car at age 20, and started driving on my own more often out of necessity, and going on the highways, that I really began to feel comfortable. After that it took about a year for me to stop worrying about driving. Now I feel totally fine, much more confident about driving, and it's definitely become second nature.