Ghosting a note doesn't always mean the note is quiet. Try this: choose any fret and play that note. Immediatly after you pick it kinda slide to any of the adjacent frets really quickly. It's gotta be done quick. You just ghosted a note. You just barely heard the first note and then suddenly, it's the next note. I hope i explained it well. ghosting just means that you kinda give the illusion of the note actually being played.