The aops books [0] will take you from prealgebra all the way to calculus and discrete math and will give you a foundation strong enough to enter any undergraduate math program in the world.
And the books all have complete solutions manuals available so you can get immediate feedback.
You could use programs like Anki to schedule your review of defintions you've understood and problems you've solved to supercharge your learning as well.
And the books all have complete solutions manuals available so you can get immediate feedback.
You could use programs like Anki to schedule your review of defintions you've understood and problems you've solved to supercharge your learning as well.
[0] https://artofproblemsolving.com/store