From what I'm guessing (correct me if I'm wrong), the "2-3 people who can help you" are so busy so you feel bad asking / it's just an inefficient arrangement for them. Moreover, tutoring for truly advanced math basically doesn't exist, or would be insanely priced (proven Wyzant tutors charge $100-150 undergrad.level)

How would you feel about a hybrid between pure Youtube & pure tutoring? Where a proven mathematician creates detailed visual explanations (that don't omit steps) on fundamental advanced topics based on what you ask? And you pay, say $30/month, which is much cheaper because of economies-of-scale for the teacher?

My incentives is that I'm the founder of https://explanations.app. I'm a MIT grad, ex-Apple, raised $500K. I'm pivoting desperately and will spend all my energy and focus on what you want if you give me a chance to work with you.