Got any resources you recommend for an adult who wants to take your advice and start working on math problems regularly as a hobby? I was pretty cool before but this should really put me over the top.
You should maybe start with a resource that covers all the basic fundamental topics like linear algebra, calculus, differential equations, and probability in a very digestible way. Assuming you already have some previous mathematical knowledge, this playlist might be a perfect fit for you. https://youtube.com/playlist?list=PLZHQObOWTQDPD3MizzM2xVFitgF8hE_ab
Once you complete the first one, you should start this one. By the way, don’t rush. Side note: Pay close attention to linear transformations in the first playlist. Once you understand that, everything else becomes much simpler. https://youtube.com/playlist?list=PLZHQObOWTQDMsr9K-rj53DwVRMYO3t5Yr