It sounds like you didn't destroy the edge at least, that's
a good start! The honing technique will come in time. I
would recommend perusing the wiki for technique tips,
but I'll throw in some of my own:

- Don't worry about low spots in the corners, you won't
be honing there anyways

- I wouldn't leave a slurry from the nagura stone on the
Shapton, just water is all you need for honing

- Keeping the blade flat on the stone with one hand is
about balancing the razor between your thumb and index
finger on the shank, and pinky and ring finger underneath
the scales. Holding your elbow up while you hone seems
to help with this

Good luck!

- Scott