Shaders really are a lot of fun - WebGL isn't ideal, though. If you want to use the same thing in an actual application, I like to recommend Anton's OpenGL 4 Tu

Shaders really are a lot of fun - WebGL isn't ideal, though. If you want to use the same thing in an actual application, I like to recommend Anton's OpenGL 4 Tutorials for quickly getting up and running with OGL4.2-4.3. It's not Vulkan, but personally I'm the sort to leave new APIs to cook for a little while.