In most cases, I recommend you simply learn to read the harmonica tablature. For the large majority of students this is a great solution and it’s very easy.
More on tabs can be found here:
Regarding reading staff music, good luck. As you will soon find out, to learn how to do this on a diatonic (10-hole) harmonica is very difficult. But if you’re motivated and you willing to give it some serious focus it can be done.