Doctors must complete a four-year undergraduate program, along with four years in medical school and three to seven years in a residency program to learn the specialty they chose to pursue. In other words, it takes between 10 to 14 years to become a fully licensed doctor.
Doctors have to study for many years because they have to be good at their job because other peoples lives are in their hands so they have to be perfect I would they do sell there wont be any mistakes
If i were you i would take medical classes if your school provides them. and you can even help yourself by learning online. taking quizzes over thing you may have read. things like that will really help you. :)