I bought the seminal work on the subject
"Country & Blues HARMONICA for the musically hopeless"
and failed 15 years ago.
but the good news is I never really gave it a go. The book(let) comes complete with Harp, is by John Gindick, Klutz press, ISBN 0-932592-08-2. And if it is out of print I know where there is an unused copy.......
It maybe why I am a drummer!!!