Just sing an E blues scale over an E G A G progression. Sing a G over that E, and it's practically an E7#9. Maybe change your E and A to E7 and A7 if you feel

Just sing an E blues scale over an E G A G progression. Sing a G over that E, and it's practically an E7#9. Maybe change your E and A to E7 and A7 if you feel like it. They're easier for beginner guitarists to play anyway.