I have no idea about the extent of gp's knowledge on subject, but I came to the comments section with similar feeling. I literally had no idea what this site is

I have no idea about the extent of gp's knowledge on subject, but I came to the comments section with similar feeling. I literally had no idea what this site is about, what it does, how I can use it... Even now that some comments have clarified some of this questions I still find the UI confusing and colors simply insane.