I stropped mine before I shaved with it, I only did a few laps and then the next day I shaved. I think I may have dulled my blade not knowing what I was going with the strop. I would say shave first so you have a reference as to what a shave ready razor feels like, then you can hopefully not dull your edge on the strop.
Don't feel like the Lone Ranger. I did exactly the same thing-dull the edge-on my first attempt at stropping. As long as you are careful on your next stropping, you should be able to bring the edge back.