Hello to everyone. I decided to move from libGDX to lwjgl. I want to make games and overall learn a bit about opengl. The thing is, when i started with lwjgl tutorials i found this:

This tutorial will explain how to access OpenGL with LWJGL and **is not intended to teach you OpenGL**

Where could i learn how to use openGL and, specifically, 2D? I know i could just type "opengl tutorial" on google, but i'm not interested in 3D stuff. And i know that basically is the same process, still i'm looking for tutorials focussed on 2d in opengl. Thanks!!!