Here's the Chord Quality Cycle Exercise off the 4th string (per request). If people find these useful I might post another with the full exercise in one image showing the chords off
Guitar Chords for Beginners | School of Rock
3-String Open Chords (Major) - Chris Tripolino
Ultimate Guide to Reading Chord Diagrams (Tips and PDF) - Guitar Gear Finder
Beginner Chords For A 4 String Cigar Box Guitar – Beginner Cigar Box Guitar
The Basic Guitar Chords For Beginners and How to Play Them
Easy Three Note Chords — The Shed
Cigar Box Guitar Chords Lesson - YouTube
Fret Daddy The Basic Chords Combo Pack for Electric/Acoustic Guitar | Guitar Center