Check with the seller, He'll probably have it all stropped up for you, so you won't have to for your first shave. When you do strop, start slow and methodical. You can practice on an old leather belt if you have one. Speed will come with time, so really take it easy at first, Not to much pressure, really just the weight of the blade...After a while you'll develop a rhythm...
As far as how many passes is up to you, A good reference point would be
25 on linen or cotton and 50 on leather...Your just really polishing up the edge....
P.S. Give the strop a good rub down with the palm of your hand before you start, It'll warm up the leather and make it more flexible for your blade....