If you can read the instructions, get ahold of a drysuit video from ebay, and then try your suit out in a pool, then dive with a buddy who has drysuit experience...you probably shouldn't waste your time and money on the course.
If you can't do the above things, and are feeling uncomfortable with the situation, then take the course.
If you can't do the above things, and are feeling uncomfortable with the situation, then take the course.