Using Z-chords (muted strings) practice the Down, down, down-up, down-up strumming pattern:
Using this srumming pattern, try (slowly at first) playing the 12-bar blues.
Repeat, over and over. Gradually increase speed:
Try the same pattern, substituting C7 for the last C on line 1:
Once you feel comfortable with these chord progressions, try playing (and maybe singing along!) to 'Oh Boy':
