How long is a piece of string?
We all learn at different speeds, but over the period of each Course you'll steadily improve and become more confident.
Remember, that 99% of people can't really dance - so if you and your partner can get on the floor and dance some basic steps, you'll look like a star, and have some fun along the way!
And lets face it, having fun is the reason we took up dancing in the first place, wasn't it?
If you want to progress faster, you might consider attending more than one class per week, or supplementing the courses with some private lessons.