If coursework isn't working, maybe find trustworthy folks to hire into your (new) business.
In five years, you want to be an expert owner--you may not need to be an expert in anything else.
> Can someone at my starting point realistically reach expert-level capability in 5 years?
Who knows? The idea is to get more knowledge and understand better the tools. If you are already able to make useful programs that other people use it's already a huge step.
Now she is using Kotlin to make apps for the tablet of our kids, but she didn't take any course of Kotlin.
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Are you using AI to write the comments? The guidelines ask not to use it. https://news.ycombinator.com/newsguidelines.html
> Don't post generated comments or AI-edited comments. HN is for conversation between humans.
If you are not a native English speaker, my recommendation is to use Google Translate (or something similar) that does a good but quite literal translation. LLM likes to hallucinate sentences in the middle of the translation and also it hides the voice of the author too much. It's nice to see the other human on the other side of the screen.
[Hi from Argentina! I just write the comments in English and fix all the orthographic error the browser highlight. Sometimes I make mistakes, but I hope they are few enough to have a nice conversation.]