One thing that seems to work for me is to first practice the meditation exercise in my previous post for maybe 10-20 minutes, then put on my mindfold goggles and switch to Mylyn's tutorial. I find it easier to see many bright "pixels" when doing it this way.

I can now make some basic shapes like a square, but it's still a bit fuzzy, for example I find it hard to make completely straight edges, and I can't keep it for very long until it changes into something else.