Holy Crap! Found A Harmonica! Need Help Nowww

Heyyyooo.

I re-organizing my old stuff this afternoon, you know, separating whats going to the trash, to be donated, etc when i found an old harmonica made by "Golden Butterfly" just standing right there in the middle of the dust, waiting to be played and studied by a musical enthusiast!

I immediately grabbed it, gave it a little swipe with some moistured paper, then some alcohol-gel (commonly known as "hand sanitizer") and it sounds like a charm.

Well, the problem comes when i searched up the basics of playing, the note positions, etc. My harmonica is a 24 double holed one ("tremolo" harmonica i think its called), there are practicaly no tutorials whatsoever on this one (none which i could find anyways). The best one i could find, though, was this one: http://www.harmonicaacademy.com/categories/20101115   (you have to pay a good 20 bucks to keep having classes and all, which is kinda depressing)

There is also no way i am going to find out in which key this thing is, the key mark that usually comes with the harmonica is almost completely gone (I am not sure if it is an F or a B). How am i going to read the pieces made for it, and worse, how am i supposed to compose "properly" with it? (there are tons of other ways i could try though, but i am very used to sheets)

The tutorials i found all used a 10 hole harmonica, and they pretty much tell you to you start playing single notes which is something very difficult to do in a double-24 one (the holes are just waaay too small)

Anyway, these are all the complaints i have at the moment. The harmonica is a surprisingly fun instrument to play around on :D .

I don't play harmonica but I used to had two (until I sold them) and this is what I recall, harmonica comes with this layering

CEGCEGCEG when you blow and

DFADFADFA when you draw

those would be the upper holes, and the lower would be

C#F#A#C#F#A#C#F#A# when you blow and

D#G#BD#G#BD#G#B when you draw

but there are several layering on harmonicas, best way is to find the notes yourself, if the harmonica is in C, your lowest note will be C, if it's in F, your lowest note is C for you but sound F (might be F lower of F higher) C=F, D=G etc