Nobody teaches you how money works, so the people who figure it out early get paid for knowing.

Money has its own vocabulary, and most of it never appears on a timetable, so people reach adulthood fluent in subjects they will never use and blank on the one that touches every week. The gap is not a personal failing. It is a hole in what gets taught, and it closes for anyone who goes and reads about it.

Learn a small piece at a time. What interest actually means, how a tax form works, what your bank charges you for. One topic a month from a library book or a plain explainer. It ends up self-taught for nearly everyone, and it is learnable.