Hiya
It's not really that scary at Peterculter Miss Moll (Can I call you Mad for short?).
Most of the people there are nice and friendly (noticeable exception to this is the guy who's the DJ there). And I'm sure you'll get to know people pretty quickly.
You'll want to get there about 7:15 to get your drink, and get ready for the beginners class at 7:30, where either Lisa or Lorna will take you through 4 beginners moves. Then there will be about 30 minutes of dancing until the intermediate class, and until you're ready to do that, you can join the refresher class run by some experienced dancers.
There's no course in the classes, so you can start as soon as you like (Tuesday?).
And when you get there at 7:15, come and say hello. I'm the bloke on the stage, behind the CD player
Steve