US Medical Insurance Project: Feedback needed!

I found this project very fun, but didn’t get too much deeper in statistics this time. I tried not to use pandas too, but used matplotlib to plot some graphs. I found the results very interesting, and apparently nothing is away from my expectations… It took me some hours to finish it, as I would do many lines and then realize that I could create a function and spare so much time hahaha

Here is the link: