If you’re looking for ideas, this book has a ton of them:
An Introduction to Computer Simulation Methods: Applications To Physical Systems
I quite like this book:
Though I’ve only read the second edition. It’s on its third edition now.
There are LOTS of interesting physical phenomena you can simulate.
If you can find this book (even an earlier edition) in your school’s library, you’ll get a good idea of how vast the fields of computational physics and computer simulations are:
The latest edition uses java rather than python but, still, it will open your eyes to a LOT of very cool applications.