Glfw 3d game modern opengl

I want to make a 3d game using glfw and glew which is modern opengl, I am unsure of how to start or what to make. please help.

This is a Khronos technologies forum, not a general game development forum. While we can help on tasks specific to Khronos technologies, general advice on how to start making a game or what game you should make is off topic here.