HI Dave, you may want to read my blog entry, Anatomy of a Reading, which will give you an idea of what to expect.
Erin Pavlina’s Blog » Blog Archive » Anatomy of a Psychic Reading
As for what the reading can tell you, it depends on our connection and your guides and what they want to tell you. A reading would help you get an idea of what your guides want you to know. Only you will know if it is accurate and real.