Ask HN: Any good resources for creating a blockchain?

Check out hyperledger.org - Fabric (a blockchain implementation) and Composer (tool to build apps/network on top of Fabric). Docs are pretty good, and there are no built-in currencies, coins, tradings and similar crap. And it is relatively easy to have it up and running locally and to deploy custom code on it (it is Go)

https://github.com/anders94/blockchain-demo

Start with a tutorial for cryptography. If you are dilettante in cryptography in general, whatever you do with blockchain will be broken by design.

Any good cryptography tutorials you can recommend?

One option would be to work with Ethereum. You can boot up your own instance of it and write your own applications that run in it.

Mine is still "booting up" i.e. downloading the block chain. It's been a month.

Can you find stable mirrors for the first N gigabytes?