On the one hand, I like your idea and I would love to find someone who would help me improve at things like math, AI/ML, software dev, electronics, and 3D printing. On the other hand, I can't get my own students to sign up for my (virtual) office hours, despite offering them extra credit.
Could a skill swap work? Like, a website that says something like "I can teach you about linear algebra if you can teach me about CAD software" -- or would the marketplace be too sparse?