Matt White wrote:
Now, if I play fills over the progression (or want to solo on it), do I move 'with' the chords and play alternatively in the pentatonic box shape for Am, then G, then F?
Or: Do I keep all notes in the Am shape since it's the key of the piece?
First off, only stupid people never ask questions, so don't think your questions are dumb. To answer that particular question, you most certainly can move pentatonically within the chords and you will start to see the merits of moving with a chord progression rather than stagnating on the tonal centre all the time.
Once you get comfortable moving around pentatonically, try and use Major and Minor scales with the same thought process, and see what those extra 2 notes actually give you ?