glfw and SDL are similar things, in that one may use one or the other to do basic operating system tasks like "get a window" which you can then draw to with opengl (or vulkan or whatever)
Even if you were programming in C++ you would have the choice between glfw or SDL for that kind of thing (or directly talking to your operating system's API!), so Go is not adding any confusion here that doesn't exist already.
I know, except SDL also has OpenGL support ;) Plus enough stuff to handle the rest of your game.
My main confusion is I know some SDL and OpenGL, but no Go. Thus, I don't know how to choose a SDL binding. Fighting with the binding is not a good thing when you want to learn a new language by doing a space invaders clone :)
And to the twitch guy I'm sorry, I'm old enough to prefer written documentation :)