There's not enough here to be sure, but you need to determine what business process you are trying to represent, and then what factors are relevant to it. In this case, I think Orders is the business process. Customer and Product are two of the dimensions. You will also need a date dimension for the order date.

There's probably more you can capture. I would suggest you read Ralph Kimball's The Data Warehouse Toolkit, a source that has been recommended many times by many people on this site. Proper modeling is essential in a successful BI solution. Software will not cover for it.

Good luck!