Do a search of this site, there are many threads with great info on running the spin. Other than that, go sailing, get wet, get up, and do it again.
To over simplify, at first, dont go out in winds over say 10=12, run downwind around 45*, watch the telltales, get them running just like you would the main (which you will run at your upwind setting, travler centered-sheet pretty tight, this works as a backstay). Crew will let the spin sheet out till the tales run back, then sheet in as the spin powers up. AT THE SAME TIME, THE HELM BEGINS TO TURN DOWN AS THE APPARENT WIND MOVES FOREWARD!!! YOU SHOULD HAVE DONE THAT 2 1/2 SECONDS AGO!!! Sorry for yelling but it is very important that these things are not only done simultaniously, but that the helm anticipates the spin powering up LIKE A FRICKING ROCKET!!! At that point, if your still upright, the helm makes "S" turns to and the crew sheets in and out to keep the sail running. Turn down to depower, up to increase power, Sheet in to keep the luff from collapsing, (you want it to just barely luff), out to prevent stall.
Welcome to the greatest point if sail!