I can tell you from experience that any type of instruction, in-person or over the internet with a webcam, will improve and expedite learning to play the GHB. I had a practice chanter for almost a year and messed around with it trying to teach myself and learn to play amazing grace.

My buddy KiltedFirePiper plays and he recommended getting an instructor before I got a bunch of bad habits. One of the best pieces of advice I have ever gotten. I learned more in one 45 minute lesson than I had in the entire time before the lesson. In less than four weeks I am steadily progressing. I am doing doublings and learned my first tune with all the embellishments. Couldn't have done it without an instructor.