Stick it out or....

Can some one shed some light or advice please.

In 2001 i recieved my cna liscene. CNA was my major in high school so when it was time to graduate hs , I took the state boards andI passed.
However, there after I took a different career path and I forgot about my cna liscence. It expired in 2003. Fastfoward to now and I decided since sping 07 I want to pursue a profession in healthcare after working in the insurance field. I remeber that I had the cna liscene so I called state board and they said I can just re test for the written and clinical.

I figured more or less that I forgot certain skills and I am sure that new information has been added from all this years. So I decided to bite the bullet and go to a training center to take the cna class over, so I a m redoing everything.
Well everything that I learned from before is so different from how I am learning now. Also all we do is read the book and take a class test. If that was the case I would bought my own book and study at home.

What I am trying to ask is should I contine , even though I am 2 weeks into finishing the class and just study on my own for the stateboard?

I honestly thought that by redoing the class at this training center would benefit me, but I really am nervous about passing stateboards this time around.

Any opinions

Nicole