Become a Certified Nursing Assistant. To become a CNA, you will need a high school diploma or GED. Then you can take a 2-6 month course through a local trade school, community college, or local hospital. Training times vary from program to program, depending on the requirements of the state and the area in which you plan to work.Where to take CNA exam?
While CNA certification is transferable between most states, some states require out-of-state CNAs to pass training and testing all over again in their new location (e.g. North Carolina, where applicants must complete a state-approved training program and take a North Carolina CNA exam).How long to become a CNA?
The duration of time in becoming a CNA will take about six to twelve weeks and up to six months. The initial requirement is the completion of the state-approved training course. It is also important that the individual will be able to pass the state certification exam.