Here is my hint for a quick start: The extension creates a new option for creating Modules. So what you have to do is create a new module and select the module type "JU Content Slider". You then have a host of styling options to play with. The options are also on display at the demo-site. SO you can try them out and satisfy yopurself that you can manipulate them to your liking.
I had some trouble with that as well and finally asked for support. They were lightning fast and extremely supportive. Within an hour, everything worked well.
Thats why, despite the lack of documentartion, I awarded 5 Stars. This support is so responsive, it easily makes up for the lack of documentation. And with the head start I gave you, you will easily reach your goals with this slider.