I'm a little confused as to why you're pursuing a CNA job when you didn't like it the first time around and you don't have any desire to be in the medical field. Perhaps you just want to work and that is what you are trained in?
When I was young and didn't have much training, I applied to a Temp Agency for secretarial positions. I had typing skills and was knowledgeable about the few programs I used while in school (email and Microsoft Word), I could answer a phone profesionally and I have decent people skills. The temp agency tested my computer skills and interviewed me. Then, they sent me on an interview.
With a temp agency, there's no cost to you. Employers pay for their services. When they sent me out on interviews, I had more confidence because the temp agency knew what the employer was looking for and they felt I was qualified for the job. My 4-week assignment turned into a 2-year gig and after the first couple of months, I was hired directly by the employer. The job ended when I left because hubby was getting out of the Navy and we were moving.
Once settled in the new place, I went to a temp agency again. I was hired by a large company who does all of their initial hiring through temps (from a legal standpoint, it's easier to end an assignment than to lay someone off). I've now been here 12 years and am leaving to pursue Nursing.
Temp assignments can vary greatly. I met one woman who strictly worked temp assignments because she liked to take long vacations and she would simply tell the agency she wasn't available during those times. If you get let go from one assignment, the agency helps you find another. If you don't like an assignment, you tell the agency and again, they find you another one. It's nice having someone help you find work like that.....particularly when it doesn't cost you anything.
You may find yourself to be much happier if you go this route.