You want personal sessions with a mathematics professor to help plan your curriculum and direct your learning! Here's where you can make that happen: Check out

You want personal sessions with a mathematics professor to help plan your curriculum and direct your learning! Here's where you can make that happen: Check out https://edeeu.education/ https://edeeu.education/. The founder, Alex Coward, is an ex-Berkeley math professor. To apply to have him as your director of studies, fill out the form at the bottom of https://edeeu.education/alexander-coward https://edeeu.education/alexander-coward. This is affordable (currently $330/month). I have the same aims as you, also learning math/physics in my 30s, and it's been a huge boost to move from purely self-directed online learning to having sessions with a math professor and a planned curriculum.