I don't mean to sound glib, but for basically every subject on that list (and then some) there are multiple instances of video lecture series on the topic on Yo

I don't mean to sound glib, but for basically every subject on that list (and then some) there are multiple instances of video lecture series on the topic on Youtube. I could recommend some specific ones if I had my list handy, but it's a Google Doc and our work network blocks access to Google Docs / Google Drive / etc. Just try searching Youtube though, for "<subject name> lectures" and then sample what you find to see if you like the instructor's style. Along with that, there are those "Schaum's Guides" for all (or nearly all) of these subjects as well. Go through a lecture series on the topic and follow along in the corresponding Schaum's Guide and you should be able to make quite a bit of progress. Brilliant might also have some useful stuff. And lastly, check Alibris for used copies of older textbooks. A texbook that costs $150.00 for the "current" (in use) edition can often be found for like $10.00 for the previous or earlier edition, since there is no real demand for those anymore. And if you're not in a formal class, you don't need to care about the specifics of the edition. So save some money and find a nice cheap copy to use.