I am in APII now and taking a CNA course this summer. I was advised to get some experience prior to taking my entrance exam to gain some insight as to what to expect. I am taking the CNA at the same school that I am currently attending. There are 2 and four year degrees. Since you are young I would recommend the four year option. More education and better pay. Your pre-requisites are in addition to the 2 or 4 year degrees. Good luck.