Hi Bas, we are here to help you but before that how good are you with Mendix Basic concepts? Did you get time to go through Learning paths? If not - https://gettingstarted.mendixcloud.com/link/path/14
And my response to your question in short - You would have to create Entities like Employees (Generalization of Account probably) a Timetable entity set association between them as required in your Domain Model. Use components like Dataview, Datagrid or ListView in a new Page. Again once you start playing around with the components you will get a fair idea about the unique qualities and limitations of each components/widgets.
Feel free to reach out anytime, welcome to the MX Community and Good Luck! :)