Here is a free OVA reference character from the kickstarter page. This is simply something to look at that will give you a basic explanation of the entire system. I will also be doing in depth posts to further explain things like combat ect.
http://www.wiseturtle.com/OVAPlayerBook-Miho.pdf (http://www.wiseturtle.com/OVAPlayerBook-Miho.pdf)