Suction cup mounts for smartphones and GPS units are popular choices among many, but they aren't legal everywhere in the United States. In other states, they may be legal, but must be positioned and used in specific ways.
It's a big step to drive. Do you remember getting in the car to drive for the first time. Was it a good experience? Were you nervous? Most people hop in the car with their parents to learn right after they take a class. I have taught a few people to drive, especially on a stick.
With technology changing in vehicles today, some of the training that you got when you were in high school might be wrong or cause injury. How you hold your hands on the steering wheel will make a huge difference.