Check out our guide to download and set up Grakn.
When you're set up, there's an introductory tutorial to show the basics of Graql and how to use the Java API.
We have a set of pages about Contributing to GRAKN.AI.
The API reference is also available in the Grakn distribution that you can download from here, in the
Additional API reference documents can be found here.
If there's anything you want to improve, you can leave us a comment using the link at the bottom of each page, or even contribute to them directly via Github.
There may be some outdated Grakn terminology used, but here is Haikal giving an introduction to Grakn.