This documentation should provide you with everything you need to get started with NEAR as well as a reference to support ongoing development.
If you're itching to jump right in and you don't want to follow a tutorial, the basics section will provide you with the cheat sheet you need to hit the ground running.
The Quick Start section provides you with everything you need to:
Quickly get an application running on NEAR using the online IDE
The Tutorials section contains several tutorials which will help you learn how to build, test and deploy smart contracts.
A simple multiplayer interactive game
Create your own ERC-20 token smart contract
How to build an Oracle
Run your own TestNet: locally or on Google Cloud
The Protocol Details section contains in-depth information about the protocol itself.
The Client API section contains documentation for the NEARLib.js library.
If you have any questions about NEAR, you can get direct access to the team behind it and other members of the community through Discord.