The thumb (p) plays the bass strings (E, A, D). In fingerstyle, the thumb acts like a metronome. A good PDF will dedicate the first 10-15 pages to alternating bass patterns. Look for exercises where the thumb plays a steady pulse (e.g., 1-2-3-4) while the fingers rest silently on the strings.
The first real exercise was brutal. "The Spider's Grip." It required him to plant his pinky on the high E string, his ring finger on the B, middle on the G, and index on the D, while his thumb played a walking bassline on the low E and A. His left hand, meanwhile, had to fret a single, unchanging C chord. fingerstyle guitar method pdf
and I'm going to show you a pattern it's probably the most basic one but we're going to start with the A minor chord. and then we' YouTube·Marty Music The thumb (p) plays the bass strings (E, A, D)