I have to admit this is the first time I have heard of using the Wicked Edge knife sharpener on a straight razor. I think I found the demo video you were talking about too. I guess it would work but seems a little complicated though for just a straight razor.
Speaking of first shaves, I would take a look at some of the articles in the "Helpful Links" section. I believe the recommendation is to go slowly and only shave from your side burn down to jawline on one side and finish with your normal method of shaving at first. You add other areas as you get comfortable with using a straight. Shaving your entire face the first time round is not really recommended but it can and has been done. I don't think I would advise that though.
Bob