I mean come on Shosty was a fan!
I mean, I'd obviously opt for really getting into the Cage prepared piano stuff, but i live in a tiny flat in London and can't exactly start getting into the mechanics of preparing a piano....especially since i have a digital....i guess I could do something to get around that, but it would involve building a lot of machines, and lots of wires, and ways of converting the signal into something and triggering a way of hitting a physical machine anyway.
I would recommend getting to know your local university and reference libraries thoroughly. You can borrow scores to sight read and investigate. For those pieces you really want to add to your repertoire you can then consider purchasing, at least you would have a chance to preview them first. Become familiar with inter library loan. It will be a significant help to you.