If you want to get started with kind, checkout our user guide. Here you will find all details to get you started along with some more advanced use cases.
If you are interested in modifying or contributing to kind, you can go and checkout our design docs where we explain how things are implemented.
For those interested in contributing to the project with code or documentation, the development guide will give you a more in-depth look into how kind works. We will start by getting the required software and setting up the environment and then take a look into how kind and its different packages are laid out.
You man also be interested in the roadmap.