The best advice I can give you is watch AFDavis's video (it is a sticky in the stropping forum) and practise. A lot. And then, once you've practised a lot, get out there and practice some more.
Being new this is the best advice I can give. I couldn't figure out what I was doing wrong until I watched this video and realized I was curling my wrist during the razor flip cause uneven pressure and blade contact.

One thing that helped me was practicing the movements holding the razor slightly above the strop. This allowed me to get a feel for the razor in my hand combined with the movements of stropping. Plus holding it above the strop helped me find a rhythm that I would use if actually stropping.