Please don't assume that you can't find similar classes through a public college or even a less expensive private one. If this is for personal growth only, I'd try to see if you can find out the books each class uses, and start there! Many time professors will have their syllabus available online. You might be able to audit a class for a substantially reduced charge (this is an on campus option) if you're not well enough to attend some lectures, it's not an issue since your participation would be informal anyway.