HI Riot Rose,
You'll see some inch loss and weight loss by going to Curves. Well done you for joining. What you have to remember when you work out, is to work the machines as hard as you can, so you get the lovely whooshing sound as they are hydrolics, not weights. If you've joined a 'Smart' curves, just go for the green.
I've been a member for years, have seen significant changes to my body, well being and fitness, and up until recently, used to be a circuit trainer as well.
The most important thing as well, is to have fun there, with a 30 minute workout, it goes by fast and if you can smile, have the odd laugh and sweat, you'll be losing in no time. Good luck