Youll find youre addicted. IMHO harmonica is about playing for yourself. Its like boxing, no matter how big and bad you are, someone, somehwere, can flat kick youre ass. So play for yourself and enjoy the music. Ive heard some outstanding players with the wrong back up sound like shit.
Most people dont know a good harp player from a bad one.
If youre a Blues Man, youre playing by ear, and if youre a good Blues Man youre playing from the heart or soul. You put all the shit lifes thrown at you, all the times youve really hurt inside, and channel it thru that harp. So do it man. Youll find youre addicted.