The best way to learn is to teach others. Mentors can be contacted via the internet and also on a local community level. The idea is to bridge the generational gap to provide encouragement to young polymaths, many of whom have no real local models or anyone they can talk to on an intellectual level. Our Arts and Science Forums have all the answers. Book ownership is essential to polymath self-identity.
Libraries are nice but they teach a short term attachment to books.
Also, a book that is free is not so highly valued, and not so completely read. The atmosphere of the book store is vastly superior to that of the public library. For polymaths, reading in a book store is the meaning of life. You could put books, computers, and art materials there for people to use. Members can provide instruction and hold meetings at such centers.