A quick heads up that I'll be releasing a new OpenGL (ES) tutorial series soon. It'll take you from zero through to rendering a simple 3D scene with lighting.
I've been posting tutorials to this blog, but they've all been AmigaOS specific. While this nicely complements the Warp3D Nova project I'm working on, most people will want to write cross-platform software. That way they can reach larger markets.
So, the new tutorials are written with cross-platform programming in mind. They're a little Windows-centric in that I use Visual Studio. However, the software libraries used are very much cross-platform. OpenGL ES 3+, SDL2, and GLM are usable on both desktop and mobile devices. Building software with these libraries makes selling your work on many different platforms a possibility.