Portfolio project: US Medical Insurance

Hi everyone!
Here’s my first data science project - Medical Insurance Project on GitHub. It took me about 24h to complete but that were really fun 24h. Tbh I rewrote the code twice - first I wrote all these methods as functions, and then I decided to rewrite everything into the class. I get the feeling that the code has better reusability this way.
I also dared to interpret the results. Unfortunately, I am not familiar with the US medical insurance system, so I could miss the point.
Any feedback would be greatly appreciated!