It is ideal to use a cadence of more than 100 rpm and a relatively low gear. For example, on an 18-speed bike, place it in low and sixth, low being the smallest gear by the pedals and sixth being the sixth gear outward from the rear wheel.
Thus the time period for becoming a lawyer after high school graduation is as follows: 4 years for undergrad + 3 years of law school + 6 months for bar study, passing, swearing in.
During your second and third years of law school, you can select classes focusing on the criminal process that would help you obtain a job as a criminal defense lawyer. You must complete three years of law school to obtain your law degree, the Juris Doctor.