Advice for folks thinking about an exercise dance class:
1. Focus on the music, not the moves. They'll come.
2. To learn the moves, find a place where you can see the teacher. I recommend being toward the back of the room at a slight diagonal to the teacher. If you're near the front, get close to the center or you'll be completely lost whenever you turn.
3. If you can't see the teacher, pick a couple of students in the front rows who're good. Don't watch one student the whole time because you'll learn that student's weaknesses as well as strengths. Also, you might look like dancing isn't what's on your mind.
4. Take a water bottle and drink a lot. Dehydration makes you stupid.
5. No one cares if you sweat. That's why you're there. If you sweat a lot, keep a towel by your water bottle.
6. Don't worry about your weight. Muscle is heavier than fat, so you may gain weight while you're getting slimmer and stronger.
7. Be aware of what you eat. Calorie-counting strikes me as an awful way to live, but it's useful to do for a few days to make you aware of how you're fueling your body.
8. Go easy. People hurt themselves badly by pushing their bodies too hard. Don't judge yourself by what you were able to do when you were younger or by what anyone else is able to do. Judge yourself by what your body is telling you. It's okay to drop out for a few moves or to leave early, so long as you keep coming back.