Have you spoken to your professor or someone else in the class about this?

It's difficult to help you without knowing exactly what you know about database design. You mention that you don't know "how to do the relationships". There are many steps involved in knowing "how to do the relationships".

Are you familiar with the different types of relationships: 1 to 1, 1 to many, many to many

If you don't know what the relationships are, then that's where you need to start.

If you know what they are, then you need to determine how the tables are related to each other with those relationships. The first step of this is deciding which tables are related to each other (don't worry about the type of relationship). Then go back and determine what type of relationship each relationship should be. After a while, you will be able to do these steps at the same time, but just take it one step at a time for now.