CNA programs are generally considered short term entry programs. You may find such a program for non-credit in your community college's adult education department, and/or it may be offered for credit. We have 2 nursing programs
here, and one requires you to be a CNA first- the other does not. In the program that does not require CNA first, they do allow you to take the CNA test at the completion of your first semester of Nursing 1.
The CNA pre-req is a high school diploma, but not always. Here, you can even take the CNA class if you are in 11th or 12th grade with your school's approval.
The nursing (LPN/RN) programs will have a lot of pre-reqs, that's for sure. In my CNA class, half were planning on being nurses. We all were taking the CNA in anticipation of getting some experience while we were in school/doing pre-reqs/etc.
If you ask around, you might find a CNA class that meets 1 or 2 nights per week for a month or two. Our state requires 75 hours. If you can do your CNA in your free time, and take some of your classes online, you should be able to start determining if you want to give nursing your full attention. If you do, you can cut your hours at work to make room for more nursing pre-reqs and maybe a day or two as a CNA.