I went to a local tech school, and got in to a CNA program right away, no wait list.
My course is 8 weeks long, two days per week, 6 hours per day. The course, books, name tag, etc. cost me about $300, and the test to become state certified will be another $100.
If you get lucky, you may be able to find an employer who'll be willing to pay for it or, better yet, train you on-site. You just gotta do some leg work. (Or Google work!