Understanding the Bogleheads philosophy is a great place to start. Along those lines, the book “The Simple Path to Wealth”, by J. L. Collins is great for developing an initial mindset on how your money can work for you.
I have read some insane upvoted comments in r/personalfinance and r/investing but bogleheads are generally on point.
The other thing I like about it is that the forums have lots of detailed personal scenario discussions that are helpful for getting real life examples of the application of the dogma.