I know a lot of developers are pretty excited about Vulkan, the new low level graphics layer from Khronos Group, the same people behind OpenGL, OpenCL, GLSL, OpenAL and more. This video looks at the relationship between Lunar G and Vulkan, explains briefly how Vulkan works (kinda...) and then shares a resource on learning Vulkan.
Hopefully by the end of this video you were slightly less confused then when you started! Thankfully, if you aren't, I've got links! ;)
And if you decided "Oh heck no!" but still want to look at low level graphics programming, check out: