For review to the U.S. Medical Insurance Project

Hello, nice to meet you all! I am a student from Ukraine.
To be honest, I am a linguist, but for now, I am amazed with the power of AI and Data Science. So, I`m here and almost finished my first attempt to create some analysis on Python.
At this moment, my progress in learning of the Data Science is 95%, and I would appreciate you to give me a review on my first peace of code.

Link to the GitHub page with the project: My-Data-Science-Projects/us-medical-insurance-costs.ipynb at main · AnnaShtadler/My-Data-Science-Projects · GitHub