A little aside on how I learned to play harmonica. I first tried in the late 1960s after I had been playing guitar for a couple of years, but couldn't understand the instructions sheet about the tongue and corner blow. I fooled around with it for a number of years, when in 1982 as a propman in the movie studios, I was assigned to a TV pilot at Paramount Studios. It starred Al Molinaro from Happy Days, and Lyle Waggoner from The Carol Burnett Show.
Pilots rehearse 4 days, then shoot on the 5th day, but the script was having problems, so a couple days in, the producers said to hang out while the writers work on the script. We sat around for a while when Al Molinaro started playing a ukulele, joined shortly by the casting director doing a soft shoe, he was a hoofer before. Sitting up in the audience bleachers, Lyle Waggoner started playing harmonica, and I mean really playing.
As soon as they finished, I went over to Lyle and said that I've been trying to play harmonica for years, but just don't get it. He replied that he will show me the same way he was shown many years before. He took my hand and put the fleshy side in his mouth and played it like it was a harmonica. I got it then and there!! I took out my harminca and played On Top of Old Smokey within minutes.
Shortly after I was assigned to another pilot, which included a young actor who, when he heard me playing during lunch brake, came over and played some great bending blues on his harmonica. I asked how to do that and he explained that it's a matter of moving the center of your tongue up and down in a controlled manner. When I was a kid, I would make loud snaps with my tongue, making it very strong and controllable, which without knowing it, prepared me to play blues. As soon as I tried, it worked.