for a beginner, you can't just throw yourself into a spin. i can, but only because the motion is one with my 'pop'. you have to go into the jump relaxed, crouched a little, and on the balls of your feet (def not leaning back - at all!)...then as you go off the lip, spring up with your hips and turn your head. when you come around from the rotation have your poles in front of you so that you can throw them down for a 4 point landing (double plant ur poles on the landing). this will keep you from landing back seat.
and furthermore, i agree with learning on a black with a little kicker over a tabletop at first. but if you are comfortable on tables and can do 180 and land, maybe it's ok to learn there.
one more thing, if u fall, get the fuck back up and hike that shit. get pissed and stomp it.
*all hail to the mighty gods of snow*