Rock in A minor — alternating bass fingerstyle New
Same idea as the basic fingerstyle version on Am, Dm, G, C, but with an alternating bass: the thumb switches between two different bass strings instead of staying on one, for a fuller accompaniment ("Travis picking" technique).
Tips
Isolate the thumb's alternation on its own first, without the other fingers, until it becomes automatic.
Chord progression — Am
Bar 1
Am
i
Bar 2
Dm
iv
Bar 3
G
VII
Bar 4
C
III