For more information, try doing a couple of things. Contact your local school district. Most districts have adult education courses available to the public; a GED class should be available through them. Sometimes local junior colleges will provide classes as well.
I'd also call Vocational Rehab. Because of your diagnosed learning difference, you might qualify through one of their programs. This agency would be listed under state services in your phone book, or you could call the Dept. of Social Services; they might be able to help you.