hey azlan, what is the key of ur harmonica? i read in ur post u got the Hohner. is it a diatonic Marine Band or Blues Harp? or is it the chromatic type with a "push-button" at the side?
ok, what little i know of harmonica is u have to play it in relation with the key of ur song. if ur harmonica is in the key of C, u try playing (or get someone to play) this blues shuffle progression:
Gx4 - Cx2 - Gx2 - Dx1 - Cx1 - Gx1 - Dx1
then u just blow/solo away on ur harmonica. it should sound ok! u try...
hehehehehh... ok, that is just a very simplistic way of playing/explaining abt the harmonica. (i'll probably get dissed by the experts/purists here!) of course u can't be like Smokey overnight. u need practice/playing/performance for years to even come close to 10% to 15% of what he does!
important note: if ur harmonica is in a different key, then u have to transpose the chords of the blues progression.