Surely the fact that you have been asked to do an assignment would mean that you should already have had lessons in database design and, therefore, already have 'a feel for how to do it'.
Every year there are people requesting previous database examples which, to be honest, you won't learn from by just looking. The best way is just to do the database yourself and ask here for advice - it's rare for people just to offer over their databases.
The fact that you mention your database needs five tables doesn't make it sound like a difficult problem either.
All versions of Access ship with db templates, one example being "Northwind." If all you want is to see database structure, functionality and application, peruse these.
As mentioned above, it can be quite hard to discern how to "do" - for want of a better term! - database design, creation and development, from merely looking at examples. Whether these examples are provided by a board member or an MS template, I find that by far the most effective way to 'get' Access is to get stuck in, and find your way around it from scratch (undoubtedly feeling confounded, impressed, pleased, frustrated and successful - usually all at the same time!). This is how I got into it, and started to learn.
For your assignment, you can of course just download a db and pass it off as your own, but come any questions or required explanations, you may be stumped