What sort of harmonica do i need to play neil young heart gold know its in G but does it have be a 16 hole or 24 what?

To play "Heart of Gold" by Neil Young in the key of G, you will need a harmonica in the key of G. This means that the harmonica will be tuned so that the note G is the lowest note that can be played.

As for the number of holes, you can use either a 16-hole or a 24-hole harmonica. A 16-hole harmonica is more common and is the type of harmonica that is typically used for blues and rock music. A 24-hole harmonica has a wider range of notes and is often used for jazz and classical music.

Ultimately, the best type of harmonica for you depends on your personal preference and playing style. If you are just starting out, a 16-hole harmonica in the key of G is a good option.