Your age has nothing to do with this. Nurses are trained and LICENSED to do their jobs. You can’t practice nursing without a license to do so.
CNAs have to take a CNA course of study. Then they also need to take a test, I believe. You should check your local community college to see when/if they offer a CNA course. This is not offered typically through hospitals or clinics.
Here…read this:
This link says CNAs in Georgia must have a HS diploma or GED.
Just do some research on this if you want to do it. You might be too young in Georgia…