https://www.modernbluesharmonica.com/beginning_harmonica.html
For blues harmonica beginners and others: a lesson on the power of repetition-with-variation and keeping the beat. With Adam Gussow of Modern Blues Harmonica. Gussow is currently appearing on Netflix in the documentary "Satan & Adam." https://www.youtube.com/watch?v=B4WZuMPXFZY
Use a key of C harmonica!