Obviously you have some familiarity with Photoshop as you nailed the tutorial quickly. I screwed it up bunches of times before I finally got one to match what it was supposed to looklike.![]()
Ascension also has some good tips on doing political borders (i beleive it was in his antique map tutorial).
You could probably still do a bit of a blur on the circular desert then add an outline/stroke around it to maintain the "magical border".
Great start though, looking forward to seeing where you go with this.