Brief thoughts (some redundancy with what others have said):

• This seems enormously broad. Like, this is material that could fill multiple books. I strongly suggest you narrow your focus significantly, at least at first.
• Most of these topics are very well covered elsewhere. Judging by your outline here and your linked comment, I suspect I've read many of the same things you have. That doesn't mean it's not worth covering here! But rather than duplicate effort saying things other people have already said, a well-sourced compilation of what you consider the best of the best advice might be more useful. Which leads me to...
• Make sure to include references and show your work. This is where you could really add value. Personal finance is a topic where there's a ton of folk wisdom, not all of which is going to be true, and it's not always easy to track these cached beliefs back to their source.
• If there's anywhere else where you can add specific value versus standard books and blogs on the subject, I recommend focusing there. e.g. If you can run Monte Carlo simulations, you could answer some of the questions about chances of successful retirement, the effect of charitable donations on such chances, etc.
• I'd also like to know if you have specific credentials or are a domain expert. I'm a CFA charterholder and have worked in finance for seven years (asset management in a family office), and I'm not sure I'd consider myself enough of an expert to write a sequence like this. I suspect I'd largely be passing down cached beliefs. If you have a strong reason to think otherwise for what you write, it'd be great to know.