My thought is the "Dry Suit course" is unnecessary. Diving dry is a combination of skills- skills you probably already have.
PLUS, having spent a great deal of money on a DS, why bleed more cash to learn how to use it? I think training should be included in the asking price of a suit.
I know my early dry dives were humbling. But, it is practice that makes a good dry diver, not instruction.
Some instruction is required I grant you. But, an entire "course"?
Perhaps you could find a buddy willing to take you throught the basics? Information is great but: You have to get the feel of that suit on your own. No instructor can advise how the air will move around for you and you alone.
Dry diving is a personal thing and with a small amount of experience it will become second nature.
peace all, D