No class - I just surrounded myself with some seasoned drysuit divers. If you're comfortable doing it without professional supervision and have friends that are experienced with drysuits, then I'd skip the class.
Take it slow like Cancun Mark said - hang out at about 20 ft for the first few dives. I've found that's where the suit is the most volitale. If you do well there, take it down a bit deeper.
The only real reason to do a class is to have a card to rent a suit if you don't own one. Sounds like your Uni-suit will fix that problem.
OH - One other peice of advice - you'll have to plan your buoyancy a lot more with a drysuit. Be sure to vent the suit before you begin to ascend, not while you are ascending. It's not quite as responsive dumping air from the drysuit air space as it is the BC. Obviously the difference in the size of the air space makes a difference. I did that on my first dry dive and took a ride from about 20' to the surface. Nothing hurt and a lot learned in a few seconds.
Take it slow like Cancun Mark said - hang out at about 20 ft for the first few dives. I've found that's where the suit is the most volitale. If you do well there, take it down a bit deeper.
The only real reason to do a class is to have a card to rent a suit if you don't own one. Sounds like your Uni-suit will fix that problem.
OH - One other peice of advice - you'll have to plan your buoyancy a lot more with a drysuit. Be sure to vent the suit before you begin to ascend, not while you are ascending. It's not quite as responsive dumping air from the drysuit air space as it is the BC. Obviously the difference in the size of the air space makes a difference. I did that on my first dry dive and took a ride from about 20' to the surface. Nothing hurt and a lot learned in a few seconds.