Schooling for programming isn't super necessary. Programming, at it's core, is not super difficult. It's effectively learning how to structure fundamental logic in a way to do what you want and then figure how to do that with the programming language you are using. There are various free resources online to get started.

Once you've learned some fundamentals, you can start some random practice project and figure out how to expand it to challenge yourself and learn from practice.

A lot of programming is also experience driven. As you code, you learn better approaches, new capabilities within your programming language, best practices, etc. Looking back at code from when I was first starting, I often find multiple potential improvements in the way I did it at the time.