k is it Salam how are you ?

then.............. when your leaving the convo ' Wa Salam ' or ' Salam ' I can never get it, and it's being buggn me ..ahhh the life of me & oh I pray I could say ' Jazakaz' and spell it right way, I'm afraid I'm going to say JACKASS , and also " Khair '' feels like spit in me throat , and yeh maybe Arabic lessons are needed ?