Do you want to learn how to build your own Redux implementation? Or you want to see how it works inside?
Implementation of Redux started from scratch for course here: https://www.youtube.com/playlist?list=PLqHlAwsJRxANFIgAf7BO8hNYdvipLERxQ
After passing all steps in master branch you would understand all the things under the hood and get a simple React-Redux project as a sandbox.
Feel free to send your pull-requests :)