Before you do anything, you should take Coursera's Learning How to Learn to make sure you have efficient study habits. Khan Academy is probably your best bet.

Before you do anything, you should take Coursera's Learning How to Learn to make sure you have efficient study habits. Khan Academy is probably your best bet. Paul's Online Math Notes, PatrickJMT, and BetterExplained can be useful supplements. If you want to "bring a nuke to a knife fight", you could work your way through all of the Art of Problem Solving books [0]. They go much deeper than a standard curriculum so your foundation would be extremely strong (especially if you use Anki to schedule your review of problems/definitions you've understood and solved). Completing it would mean there's unlikely to be any math book that's outside of your reach. This is complete overkill, though. [0] https://artofproblemsolving.com/store https://artofproblemsolving.com/store