Data modeling can be an exhausting, time consuming process. Here are some samples that may establish a starting point.
The website has close to 100 database models for experimentation, practice and examples.
"My intention is to provide a wide range of 'Kick Start' Models that anyone can use as a starting-point, and could extend cleanly and logically, with appropriate reference to the Business Rules.
It is not my intention to provide Models that can be used off-the-shelf to meet the requirements of a large commercial organization.
After all, that is one of the things I do for a living !!!
None of the Models is the complete and final solution in its area, but any of them can be added to easily and quickly to meet a specific requirement. The logic in each Model is intended to be correct and to contain the minimum Entities for the area being modeled."